Internet DRAFT - draft-kini-i2rs-fb-rib-info-model
draft-kini-i2rs-fb-rib-info-model
I2RS working group S. Kini
Internet-Draft Ericsson
Intended status: Standards Track S. Hares
Expires: August 10, 2016 L. Dunbar
Huawei
A. Ghanwani
R. Krishnan
Dell
D. Bogdanovic
Juniper Networks
R. White
Linkedin
February 7, 2016
Filter-Based RIB Information Model
draft-kini-i2rs-fb-rib-info-model-03
Abstract
This document defines an information model associated with the I2RS
ephemeral state for filter-based routing of IP packets via a Filter-
based Routing Information Base (FB-RIB). FB-RIBs (ephemeral and non-
ephemeral) are associated with specific interfaces interfaces on a
routing device, and process packets received on these interfaces
according a filtering policy. A filtering policy is a a minimalistic
event-match_condition-action (ECA) policy with only one event - the
reception of a frame/packet of data on an interface. The match
conditions in the filter policy are n-tuple matches based on the
content of the frame/packet or the time of its arrival. Filter-based
policy allows actions which modifying the frame/packet, forward the
frame or packet, or drop the frame/packet. Filter-Based Policy in
FB-RIBs engages before any destination based routing so the FB-RIBs
provide a destination-based default RIB that will be used if none of
the filters are matched.
Status of This Memo
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute
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Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any
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time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress."
This Internet-Draft will expire on August 10, 2016.
Copyright Notice
Copyright (c) 2016 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1. Definition of I2RS Filter Based RIB . . . . . . . . . . . 3
1.2. I2RS Use Cases Suported by Filter-Based RIB . . . . . . . 4
1.3. Definitions and Acronyms . . . . . . . . . . . . . . . . 4
2. I2RS Filter-Based RIB place among Filter-Based RIBS . . . . . 5
2.1. Ephemeral State versus Configuration State . . . . . . . 5
2.2. Need for Order . . . . . . . . . . . . . . . . . . . . . 6
2.3. ECA Policy Supported . . . . . . . . . . . . . . . . . . 8
2.4. Relationship between Filter-RIBs and RIBS . . . . . . . . 8
3. Filter-Based-RIB module . . . . . . . . . . . . . . . . . . . 9
3.1. ietf-fb-rib Configuration: Top level Container . . . . . 10
3.2. ietf-fb-rib-opstate: Operational Top Level Container . . 12
3.3. fb-ribs: List of Filter-Based RIBs (Configuration) . . . 14
3.4. fb-rib-oper-status - list of filter-ribs with operational
status . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.5. Packet-reception Event-Condition-Action Policy . . . . . 16
4. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 18
5. Security Considerations . . . . . . . . . . . . . . . . . . . 18
6. References . . . . . . . . . . . . . . . . . . . . . . . . . 19
6.1. Normative References: . . . . . . . . . . . . . . . . . . 19
6.2. Informative References . . . . . . . . . . . . . . . . . 20
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 20
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1. Introduction
The Interface to the Routing System (I2RS)
[I-D.ietf-i2rs-architecture] architecture provides dynamic read and
write access to the information and state within the routing
elements. The I2RS client interacts with the I2RS agent in one or
more network routing systems.
This document provides an information module for Filter Based Routing
Information Base (FB-RIB) and describes the I2RS interaction with
routing filters within a routing element.
1.1. Definition of I2RS Filter Based RIB
Filter-based routing is a technique used to make packet forwarding
decisions based policy-based filters that are matched to the incoming
packets. These filter policies are a minimalistic "event-Match
Condition-Action" policy with one event - the reception of a frame or
packet on an associated interface. The ECA policies have:
o event = reception of frame/packet on associated interface,
o match condition = policy filters which match portions of frame/
packet,
o actions - to modify frame/packet, and forward or drop frame/packet
Filter-Based forwarding may match on the condition of any portion of
the frame/packet. Figure 1 shows some of the filters that can be
applied to the reception of packets. The filter for individual
fields can be combined with an "AND" or and "OR", but the default
combination is that of an "AND".
Ingress filter Matches (for ECA policy)
|
|
+--------+------+------+---+--+-----+-----+----+-----+------+------+
| | | | | | | | | |
| | | | | | | | | |
L1 L2 L3 L4 VLAN VNID size Time packet/ ...
header header header header header frame
receive
count
Figure 1: Possible matching conditions for basic network filters
A Filter-Based Routing Information Base (FB-RIB)) is a set of packet-
reception ECA policy rules which are:
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o ordered, and
o apply to specific interfaces
If all matches fail, default action is to forward the packet using a
specific RIB from:
o routing RIBs as described in [I-D.ietf-netmod-routing-cfg]"
o ephemeral I2RS RIBs as described in
[I-D.ietf-i2rs-rib-info-model].
1.2. I2RS Use Cases Suported by Filter-Based RIB
The I2RS use cases which benefit from Filter-Based Routing are:
o Protocol independent Use cases and large flow use cases described
in [I-D.hares-i2rs-usecase-reqs-summary].
o the use cases of steering traffic to their designated service
functions that are different than the packet's destinations, and
o large flow use cases described in
[I-D.hares-i2rs-usecase-reqs-summary]
1.3. Definitions and Acronyms
CLI
Command Line Interface
FB-RIB
Filter-Based Routing Information Base
FB-Filter
One filter in the filter-based RIB. The filters are Event-
Condition-Action filters often represented by the form "if
Condition then action".
Policy Group
Policy Groups are groups of policy rules. The groups of policy in
the basic network policy [I-D.hares-i2rs-pkt-eca-data-model] allow
grouping of policy by name. This name allow easier management of
customer-based or provider based filters.
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RIB IM
RIB Informational Model (RIB IM) is an information model which
describes a Routing Information Base
Routing instance
A routing instance is a core data model within
[I-D.ietf-netmod-routing-cfg]. An instance creates a logical
slice of the router and allows different logical slices to
communicate to communicate with each other.
2. I2RS Filter-Based RIB place among Filter-Based RIBS
The following three types of Filter-Based RIBs exist:
o Policy Based Routing - configured by packet ECA policy,
o I2RS Filter-Based RIBs - proposed by this document,
o BGP Flow Specification [RFC5575].
This section examines issues regarding ephemeral versus config state,
the need for order within policies, and the current yang support for
packet-reception ECA policy.
2.1. Ephemeral State versus Configuration State
Filter-Based RIBs with packet-reception ECA policy exist in three
types of state: configuration state, ephemeral reboot state (I2RS),
and BGP Session state.
Policy Routing configures the packet-reception ECA policy in
configuration state, and runs this policy to specific interfaces.
This configuration state may be configured by NETCONF/RESTCONF in
yang modules or proprietary configuation via CLI. This specification
examines configuration state specified in yang modules and extended
by proprietary additions to yang modules. Yang modules which specify
the normal routing RIBs include:
[I-D.ietf-netmod-routing-cfg]
statics routes (TBD)
Configuration state set via secure protocols (NETCONF [RFC6241] or
RESTCONF [I-D.ietf-netconf-restconf]) and survives the reboot of the
system. draft-hares-rtgwg-fb-rib refers to Filter-Based RIB
described above which contains an ordered list of packet
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I2RS ephemeral state [I-D.ietf-i2rs-ephemeral-state] is state which
does not persist across a reboot (software or hardware). I2RS
ephemeral state can be indicated a portion of a sub-tree, a sub-tree,
tree within a yang modules, or a full module. I2RS Ephemeral state
may reference configuration state or protocol state (E.g. MPLS LSP
or BGP peer state).
The I2RS Filter-Based RIB is defined as a ephemeral module with
possible links to the following:
default RIBs either in the I2RS RIB module
[I-D.ietf-i2rs-rib-data-model] or configured RIB
[I-D.ietf-netmod-routing-cfg],
interfaces that I2RS Filter-Based RIB is running on.
BGP Flow Specification [RFC5575] passes packet-reception ECA Policy
in BGP UPDATE packets (NLRI and BGP Extended Communities). The BGP
Flow Specification packet-reception ECA policy is bgp peer session
ephemeral state which disappears when the BGP peer closes the BGP
Session. This bgp session ephemeral state can refer to configuration
state for interfaces configured, and for default RIBs. [RFC5575]
does not consider I2RS configuration state.
Precedence between these three types of state is defined as most
dynamic to least dyanmic, or
1. BGP Session packet-reception Filter Policy,
2. I2RS Filter-Based RIB Policy,
3. Configuration Filter-RIB Policy (aka Policy RIB).
Precedence impacts when two types of state try to operate on the
exact same filter match in the policy. However, Filter-Based RIBS
operate first on "order" and priority within the order, and then on
the level of ephemeral state.
2.2. Need for Order
Filter-Based RIBs use packet-reception ECA policy instead of
destination based forwarding to determine where to forward/send a
packet. A packet which matches multiple filters in a Filter-Based
RIB will be forwarded based on the first filter matched. Due to
first-match processing, the order of filters matters in the process.
All Filter-Based RIBs (configuration, I2RS, and BGP Flow
Specification) forwarded based on the first match filter.
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Filter-Based Policy is inserted in the RIB by order number. If order
number is tied, then precedence is based on the type of filter,
longest prefix match (MAC or IP address (IPv4/IPv6), lowest value, or
longest string). It is expected that order will contain a large
enough number space to differentiate most policies.
Note: [RFC5575] does not support order, but current work is beginning
draft-hares-idr-flow-spec-combo-00.txt to support order in BGP flow
specification.
flow-rule-cmp (a,b)
{
comp1 = next_component(a); /component is the type of filter
comp2 = next_component(b);
while (comp1 || comp2) {
// component_type returns infinity on end of list
if (component_type(comp1) < component_type(comp2)) {
return A_HAS_PRECEDENCE;
}
if (component_type(comp1) > component_type(comp2)) {
return B_HAS_PRECEDENCE;
}
// IP values)
if (component_type(comp1) == IP_DESTINATION || IP_SOURCE) {
common = MIN(prefix_length(comp1),prefix_length(comp2));
cmp = prefix_compare (comp1,comp2,common);
// not equal, lowest value has precedence
// equal, longest match has precedence;
} else if (component_type (comp1) == MAC_DESTINATION ||
MAC_SOURCE) {
common = MIN(MAC_address_length(comp1),
MAC_address_length(comp2));
cmp = MAC_Address_compare(comp1,comp2,common);
//not equal, lowest value has precedence
//equal, longest match has precedence
} else {
common = MIN(component_length(comp1),
component_length(comp2));
cmp = memcmp(data(comp1), data(comp2), common);
//not equal, lowest value has precedence
//equal, longest string has precedence
}
}
}
Figure 2 - precedence
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2.3. ECA Policy Supported
The filter based-RIB uses event-condition-action policy (ECA) rules.
The following policies are used in this version of the yang module:
o Access lists (ACLs) [I-D.ietf-netmod-acl-model]
o Packet-reception ECA policy [I-D.hares-i2rs-pkt-eca-data-model]
Proprietary filters may augment these IETF defined ECA rules. The
IETF filters support basic filtering plus QOS and load balancing.
Below is an example set of match conditions on ingreessI2RS that the
basic I2RS FB-RIB can support.
2.4. Relationship between Filter-RIBs and RIBS
Filter-based RIBS (FB-RIBs) provide packet-reception event-match
condition-action policy, but if the filters do not provide match the
Filter-Based RIBs provide default RIBs for destination based
forwarding (IP or MAC). The following are restrictionsThe for the
default RIBs:
o The configuration FB-RIBs can only refer to another configuration
RIB.
o The I2RS FB-RIBs can refer to a configuration RIB, an I2RS reboot
ephemeral RIB, or a BGP Session ephemeral RIB. The BGP peer
session may be dropped while a I2RS FB-RIB is in session. If so,
all defaults pointing to the BGP RIB must be removed. The I2RS
RIB may be removed, and if so all defaults pointing to that route
must be removed. The default order of precedence for the default
RIB is the BGP-Peer default RIB, the I2RS default FB-RIB, and the
configuration default RIB.
o The BGP session FB-RIBs can refer to a configuration RIBs, a I2RS
Ephemeral RIB, and a BGP RIB. Just as with the I2RS FB-RIB, the
precedence if multiple default RIBs exist are: BGP Peer default
RIB, then I2RS default RIB, followed by configuration default RIB.
o The I2RS Ephemeral RIB module is described in
[I-D.ietf-i2rs-rib-info-model] and [I-D.ietf-i2rs-rib-data-model].
The I2RS RIB contains a collection of RIBs with the following
information per instance:
* The set of interfaces indicates which interfaces are associated
with this routing instance.
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* The RIBs specify how incoming traffic is to be forwarded based
on destination (E.g. RIB and FB-RIB).
* The routing parameters control the information in the RIBs.
o A routing instance may have both an I2RS RIB modules and I2RS FB-
FIB modules associated with it. If the I2RS RIB list of
interfaces does not contain the list of interfaces the FB-RIB is
operating on, then the I2RS RIB must not be installed as a default
RIB.
o FB-RIB and RIB can not be used at the same time, which means:
* If a router doesn't support filter-based routing, a router MUST
use RIB and MUST not use FB-RIB. The default RIB for a FB-RIB
should destination-based RIB, and this RIB may be generated by
routing protocols. However, the FB-RIB forwarding must take
precedence over the default RIB.
* If a router supports filter-based routing:
+ FB-RIB is used
+ Multiple FB-RIBs may exist within a routing instance
+ An interface can be associated with at most one FB-RIB
+ The Default RIB for a FB-RIB is used if several criteria
beyond destination address is not matched.
3. Filter-Based-RIB module
A Filter-Based RIB (FB-RIB)contains an ordered set of filter routes
where each filter-route is a match condition followed by an action.
An FB-RIB is contained in a routing-instance defined by
[I-D.ietf-netmod-routing-cfg]. An FB-RIB has a list of interfaces
that is a subset of the list of interfaces in the routing-instance
that it is contained in. An incoming packet on an interface
belonging to a FB-RIB is first handled by the FIB programmed using
that FB-RIB. If no match action succeeds, then the packet is
forwarded using the FIB programmed using the RIB of that routing
instance.
An ordered set of filters implies that the insertion of a filter
route into a FB-RIB MUST provide the ability to insert a filter route
at any specific position and delete of a filter-based route at a
specific position. The ability to change a filter route at a
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specific position combines these two functions (delete an existing
filter route rule and add a new policy rule).
Each FB-RIB is contained within a routing instance, but one routing
instance (named by an INSTANCE_NAME) can contain multiple FB-RIBs.
Each routing instance is associated with a set of interfaces, a
router-id, and list of FB-RIBs. Each interface can be associated
with at most one FB RIB.
The processing within the FB-RIB process within the routing system is
expected to do the following:
o When a packet successfully matches match term/entry in a filter-
route, the corresponding rule-actions are applied.
o If a packet does not match the match term/entry in the filter
route, the filter route processing goes to the next term/entry in
the order, and looks for a match, within the current filter or
goes to the next filter in the list. This continues until either
a filter route match term/entry is successfully matched, or no
more filters in the list exists.
o If no match has been found within list of filters in FB-RIB list,
then the packet will be forwarded using the I2RS RIB specified by
the FB-RIB if one exists. If no I2RS RIB is specified, the FB-RIB
will check a configured RIB. If no configured RIB exists, the
packet will be discarded.
Groups within a I2RS FB-RIB allow the logical grouping of rules under
a name for ease of access. For example, take two customers.
Customer-A has three packet-reception ECA policies that insert rules
at order 5, 10, and 20. Customer-B has three packet-reception ECA
policies that insert rules at 4, 8, and 9. The use of the group
names "Customer-A" and "Customer-B" allow easy addition or deletion
of these rules, but do not change the ordering of these rules.
3.1. ietf-fb-rib Configuration: Top level Container
The FB-RIB configuration entries associated with each FB-RIB in a
routing instance are:
default-instance-name (FB-FIB-instance-name): default Routing
Instance name for all FB-RIBs
default-router-id (FB-RIB-router-id): router id associated with the
FB-RIB function of the Routing instance
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config-fb-rib: list of filter-based RIBs created by configuration
processes, and described in draft-hares-rtgwg-fb-rib which
utilizes [I-D.hares-i2rs-fb-rib-data-model] to define common
filter-based RIB structures.
i2rs-fb-rib: list of I2RS reboot ephemeral filter-based RIBs.
Described in this draft with data model in
[I-D.hares-i2rs-fb-rib-data-model] which utilizes
[I-D.hares-i2rs-fb-rib-data-model] to define common filter-based
RIB structures.
bgp-fb-rib: list of BGP Session ephemeral filter-based RIBs
Described in this draft, and data model in (draft-hares-idr-bgp-
fb-rib-data-model). which utilizes
[I-D.hares-i2rs-fb-rib-data-model] to define common filter-based
RIB structures, and [I-D.hares-i2rs-pkt-eca-data-model] to the
common packet-reception ECA filters.
Configuration RIBS
+-----------------------------------------+
| routing instance |
+-------|-------------|----------------|--+
| | |
| | |
+---------|----+ +-----|-----+ +--------|-----+
|config-fb-rib | |i2rs-fb-rib| |bgp-fs-fb-rib |
+------|-------+ +-----|------+ +------|------+
|............:....|...............|
: (uses common structures
: in separate lists of FB-RIBs)
+--------|----+
|fd-ribs* |
| |
+--|----------+
|
Figure 3: Routing instance with three types of
Filter-FIB lists
The Top-level Yang structure for a global configuration of Filter-
Based RIBs are:
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Augments rt:logical-network-elements:\
:logical-network-element:network-instances: \
network-instance
ietf-fb-rib module
+--rw ietf-fb-rib
+--rw default-instance-name string
+--rw default-router-id rt:router-id
+--rw config-fb-ribs
if-feature "config-filter-based-RIB";
uses fb-ribs;
+--rw i2rs-fb-ribs
if-feature "I2RS-filter-based-RIB";
uses fb-rib-t:fb-ribs;
+--rw bgp-fs-fb-ribs
if-feature "BGP-FS-filter-based-RIB";
uses fb-rib-t:fb-ribs;
Figure 5: configuration state
3.2. ietf-fb-rib-opstate: Operational Top Level Container
The FB-RIB operational state entries associated with each FB-RIB in a
routing instance are:
default-instance-name (FB-FIB-instance-name): Default Routing
Instance for FB-RIBs.
default-router-id (FB-RIB-router-id): Default Router ID associated
FB-RIBs.
config-fb-rib-opstate operational state for config RIB described in
draft-hares-rtgwg-fb-rib which utilizes
[I-D.hares-i2rs-fb-rib-data-model] to define common structures.
i2rs-fb-rib-opstate: operational state for I2RS reboot ephemeral
Filter-Based RIB. Logic is described in this draft, and data
model is described in [I-D.hares-i2rs-fb-rib-data-model]. Common
structures are defined in [I-D.hares-i2rs-fb-rib-data-model].
bgp-fb-rib-opstate: BGP Session ephemeral Filter-Based RIB-interface
with logic described in this draft, and data model in (draft-
hares-bgp-fb-rib-data-model). Common structures are also defined
in [I-D.hares-i2rs-fb-rib-data-model], and
[I-D.hares-i2rs-pkt-eca-data-model].
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Operational state
+-----------------------------------------+
| routing instance |
+-------|-------------|----------------|--+
| | |
| | |
+---------|----+ +-----|------+ +--------|-----+
|config-fb-rib-| |i2rs-fb-rib-| |bgp-fs-fb-rib-|
| opstate | | opstate | | opstate |
+------|-------+ +-----|------+ +------|-------+
|............:....|...............|
: (uses common structures
: in separate lists of FB-RIBs)
+--------|-----------+
|fb-ribs_oper_status |
| |
+--|-----------------+
|
Figure 4: Routing instance with three types of
Filter-FIB lists
The Top-level Yang structure for a global operational state of
Filter-Based RIBs are:
Augments rt:logical-network-elements:\
:logical-network-element:network-instances: \
network-instance
ietf-fb-rib module
+--rw ietf-fb-rib-opstate
+--rw default-instance-name string
+--rw default-router-id rt:router-id
+--rw config-fb-rib-opstate
if-feature "config-filter-based-RIB";
uses fb-rib-t:fb-ribs-oper-status;
+--rw i2rs-fb-rib-opstate {
if-feature "I2RS-filter-based-RIB";
uses fb-rib-t:fb-ribs-oper-status;
+--rw bgp-fs-fb-rib-opstate
if-feature "BGP-FS-filter-based-RIB";
uses fb-rib-t:fb-ribs-oper-status;
Figure 5: operational state
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3.3. fb-ribs: List of Filter-Based RIBs (Configuration)
Filter-Based RIB structures for configuration (fb-ribs) contain a
list of fb-rib structures with the following high-level structure:
fb-rib-name: Name of fb-Rib (key),
address-family: AFI for Address Family,
fb-type: type of FB-RIB (config, I2RS reboot ephemeral, or BGP Flow
Specification session ephemeral).
Interface_list(FB-RIB-interface): A list of interfaces that all of
the FB-RIB RIB operates over. This list must be a subset of the
interface_list associated with the routing instance.
default-RIBS: structure with default RIBS in configuration space,
I2RS RIB space, or BGP VPN space.
instance-using: list of instances using this FB-RIB (normally one).
fb-rb-updates: Tracking Write-References to this RIB.
uses pkt-eca:pkt-eca-policy-set: pkt ECA Policy described in
[I-D.hares-i2rs-pkt-eca-data-model]
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+--------|----+
|FB-RIBs* |
| |
+--|----------+
|
^
/|\
+-----^---------------------------+
| FB-RIB |
+----|-------|----------|-----|---+
| +-----|-----+ +--------+ +-------+
| |interface | |default | |default|
| | list | |I2RS | | Config|
| | (Names) | | RIB | | RIB |
| +-----------+ +--------+ +-------+
|
+-----------------------+
| FB-RIB Ordered List |
| of pkt ECA policy |---------+
+-----------|-----------+ |
| |
+-----------|-----------+ |
| Groups | |
+-----------|-----------+ |
| |
+-----------|--------------+ |
| Rules |------+
|(ordered list of rules of |
| the form match-action) |
+--------------------------+
Figure 5: fb-rib (configuration FB-RIB)
The Top-level Yang structure for the FB-RIB types is:
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module: fb-rib-types:
+--rw fb-ribs
+--rw fb-rib* [rib-name]
| +--rw rib-name string
| | rw fb-type identityref / ephemeral or not
| +--rw rib-afi rt:address-family
| +--rw fb-rib-intf* [name]
| | +--rw name string
| | +--rw intf if:interface
| +--rw default-rib
| | +--rw rt-rib rt:routing:routing-instance:name
| | +--rw config-rib string; // config rib name
| | +--rw i2rs-rib:routing-instance:name
| | +--rw i2rs-rib string; //ephemeral rib name
| | +--rw bgp-instance-name string
| | +--rw bgp-rib string //session ephemeral
| +--rw fb-rib-refs
| | +--rw fb-rib-update-ref uint32 /count of writes
| +--rw instance-using*
| | device:networking-instance:networking-instance-name
| +--use pkt-eca:pkt-eca-policy-set
Figure 6: FB RIB Type Structure
3.4. fb-rib-oper-status - list of filter-ribs with operational status
The Filter-Based RIB structures for operational state have the
following entries:
fb-rib-name: Name of fb-Rib (key)
uses pkt-eca:pkt-eca-opstate: pkt ECA policy operational state
described in [I-D.hares-i2rs-pkt-eca-data-model]
HIgh Level Yang
+--rw fb-ribs-oper-status
+--rw fb-rib-oper-status* [fb-rib-name]
uses pkt-eca:pkt-eca-opstate
3.5. Packet-reception Event-Condition-Action Policy
The three levels of policy are expressed as:
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Config Policy definitions
=======================================
Policy level: pkt-eca-policy-set
group level: pkt-eca-policy-set:groups
rule level: bnp-eca-policy-set:rules
Operational State for Policy
=======================================
Policy level: pkt-eca-policy-opstate
group level: pkt-eca-policy-opstate:groups-status
rule level: bnp-eca-policy-opstate:rules_opstate*
bnp-eca-policy-opstate:rules_opstats*
figure
High level Yang structure for Configuration and operational status
are shown in figure x below.
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Packet Reception ECA policy
module ietf-pkt-eca-policy
+--rw pkt-eca-policy-cfg
| +--rw pkt-eca-policy-set
| +--rw groups* [group-name]
| | +--rw vrf-name string
| | +--rw address-family
| | +--rw group-rule-list* [rule-name]
| | | +--rw rule-name
| | | +--rw rule-order-id
| +--rw rules [order-id rule-name]
| +--rw eca-matches
| | ...
| +--rw eca-qos-actions
| | ...
| +--rw eca-fwd-actions
| | ...
+--rw pkt-eca-policy-opstate
+--rw pkt-eca-opstate
+--rw groups* [group-name]
| +--rw rules-installed;
| +--rw rules_status* [rule-name]
+--rw rule-group-link* [rule-name]
| +--rw group-name
+--rw rules_opstate* [rule-order rule-name]
| +--rw status
| +--rw rule-inactive-reason
| +--rw rule-install-reason
| +--rw rule-installer
| +--rw refcnt
+--rw rules_op-stats* [rule-order rule-name]
+--rw pkts-matched
+--rw pkts-modified
+--rw pkts-forwarded
Figure 4 - High-Level Yang structure.
4. IANA Considerations
This informational draft does not specify any IANA requests.
5. Security Considerations
A I2RS defines an ephemeral data store that will dyanamically change
traffic paths set by the routing configuration. An I2RS FB-RIB
provides dynamic Event-Condition-Action policy that will further
change the operation of forwarding by allow dyanmic policy and
ephemeral RIBs to alter the traffic paths set by routing
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configuration. Care must be taken in deployments to use the
appropriate security and operational control to make use of the tools
the I2RS RIB and I2RS FB-RIB provide.
6. References
6.1. Normative References:
[I-D.hares-i2rs-fb-rib-data-model]
Hares, S., Kini, S., Dunbar, L., Ghanwani, A., Krishnan,
R., Bogdanovic, D., Tantsura, J., and R. White, "Filter-
Based RIB Data Model", draft-hares-i2rs-fb-rib-data-
model-01 (work in progress), January 2016.
[I-D.hares-i2rs-pkt-eca-data-model]
Hares, S., Wu, Q., and R. White, "Filter-Based Packet
Forwarding ECA Policy", draft-hares-i2rs-pkt-eca-data-
model-00 (work in progress), January 2016.
[I-D.ietf-i2rs-architecture]
Atlas, A., Halpern, J., Hares, S., Ward, D., and T.
Nadeau, "An Architecture for the Interface to the Routing
System", draft-ietf-i2rs-architecture-12 (work in
progress), December 2015.
[I-D.ietf-i2rs-ephemeral-state]
Haas, J. and S. Hares, "I2RS Ephemeral State
Requirements", draft-ietf-i2rs-ephemeral-state-02 (work in
progress), September 2015.
[I-D.ietf-i2rs-rib-data-model]
Wang, L., Ananthakrishnan, H., Chen, M.,
amit.dass@ericsson.com, a., Kini, S., and N. Bahadur, "A
YANG Data Model for Routing Information Base (RIB)",
draft-ietf-i2rs-rib-data-model-04 (work in progress),
November 2015.
[I-D.ietf-i2rs-rib-info-model]
Bahadur, N., Kini, S., and J. Medved, "Routing Information
Base Info Model", draft-ietf-i2rs-rib-info-model-08 (work
in progress), October 2015.
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119,
DOI 10.17487/RFC2119, March 1997,
<http://www.rfc-editor.org/info/rfc2119>.
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[RFC7223] Bjorklund, M., "A YANG Data Model for Interface
Management", RFC 7223, DOI 10.17487/RFC7223, May 2014,
<http://www.rfc-editor.org/info/rfc7223>.
6.2. Informative References
[I-D.hares-i2rs-usecase-reqs-summary]
Hares, S. and M. Chen, "Summary of I2RS Use Case
Requirements", draft-hares-i2rs-usecase-reqs-summary-02
(work in progress), May 2015.
[I-D.ietf-netconf-restconf]
Bierman, A., Bjorklund, M., and K. Watsen, "RESTCONF
Protocol", draft-ietf-netconf-restconf-09 (work in
progress), December 2015.
[I-D.ietf-netmod-acl-model]
Bogdanovic, D., Koushik, K., Huang, L., and D. Blair,
"Network Access Control List (ACL) YANG Data Model",
draft-ietf-netmod-acl-model-06 (work in progress),
December 2015.
[I-D.ietf-netmod-routing-cfg]
Lhotka, L. and A. Lindem, "A YANG Data Model for Routing
Management", draft-ietf-netmod-routing-cfg-20 (work in
progress), October 2015.
[RFC5575] Marques, P., Sheth, N., Raszuk, R., Greene, B., Mauch, J.,
and D. McPherson, "Dissemination of Flow Specification
Rules", RFC 5575, DOI 10.17487/RFC5575, August 2009,
<http://www.rfc-editor.org/info/rfc5575>.
[RFC6241] Enns, R., Ed., Bjorklund, M., Ed., Schoenwaelder, J., Ed.,
and A. Bierman, Ed., "Network Configuration Protocol
(NETCONF)", RFC 6241, DOI 10.17487/RFC6241, June 2011,
<http://www.rfc-editor.org/info/rfc6241>.
Authors' Addresses
Sriganesh Kini
Ericsson
Email: sriganesh.kini@ericsson.com
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Susan Hares
Huawei
7453 Hickory Hill
Saline, MI 48176
USA
Email: shares@ndzh.com
Linda Dunbar
Huawei
USA
Email: linda.dunbar@huawei.com
Anoop Ghanwani
Dell
Email: anoop@alumni.duke.edu
Ram Krishnan
Dell
Email: Ramkri123@gmail.com
Dean Bogdanovic
Juniper Networks
Westford, MA
Email: deanb@juniper.net
Russ White
Linkedin
Email: russ@riw.us
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