Link-State Family¶
The BGP Link-State (BGP-LS) Multiprotocol extension allows to distribute Link-State and Traffic Engineering (TE) information. This information is typically distributed by IGP routing protocols with in the network, limiting LSDB or TED visibility to the IGP area. The BGP-LS-enabled routers are capable to collect such information from networks (multiple IGP areas, inter-AS) and share with external components (i.e. OpenDaylight BGP). The information is applicable in ALTO servers and PCEs, as both need to gather information about topologies. In addition, link-state information is extended to carry segment information (Spring).
Configuration¶
This section shows a way to enable IPv4 and IPv6 Labeled Unicast family in BGP speaker and peer configuration.
BGP Speaker¶
To enable BGP-LS support in BGP plugin, first configure BGP speaker instance:
URL: /rests/data/openconfig-network-instance:network-instances/network-instance=global-bgp/protocols
Method: POST
Content-Type: application/xml
Request Body:
<protocol xmlns="http://openconfig.net/yang/network-instance">
<name>bgp-example</name>
<identifier xmlns:x="http://openconfig.net/yang/policy-types">x:BGP</identifier>
<bgp xmlns="urn:opendaylight:params:xml:ns:yang:bgp:openconfig-extensions">
<global>
<config>
<router-id>192.0.2.2</router-id>
<as>65000</as>
</config>
<afi-safis>
<afi-safi>
<afi-safi-name>LINKSTATE</afi-safi-name>
</afi-safi>
</afi-safis>
</global>
</bgp>
</protocol>
Content-Type: application/json
Request Body:
{
"protocol": [
{
"identifier": "openconfig-policy-types:BGP",
"name": "bgp-example",
"bgp-openconfig-extensions:bgp": {
"global": {
"config": {
"router-id": "192.0.2.2",
"as": 65000
},
"afi-safis": {
"afi-safi": [
{
"afi-safi-name": "LINKSTATE"
}
]
}
}
}
}
]
}
Linkstate path attribute¶
The BGP-LS specification has seen early field deployments before the code point assignments have been properly allocated. RFC7752 specifies this attribute to be TYPE 29, while earlier software is using TYPE 99.
OpenDaylight defaults to using the RFC7752 allocation, but can be reconfigured to recognize the legacy code point allocation. This can be achieved through Karaf shell in a running instance:
opendaylight-user@root>config:edit org.opendaylight.bgp.extensions.linkstate
opendaylight-user@root>config:property-set ianaAttributeType false
opendaylight-user@root>config:update
Alternatively, the same effect can be achieved by placing the line ianaAttributeType = false into
etc/org.opendaylight.bgp.extensions.linkstate.cfg in the installation directory.
BGP Peer¶
Here is an example for BGP peer configuration with enabled BGP-LS family.
URL: /rests/data/openconfig-network-instance:network-instances/network-instance=global-bgp/openconfig-network-instance:protocols/protocol=openconfig-policy-types:BGP,bgp-example/bgp-openconfig-extensions:bgp/neighbors
Method: POST
Content-Type: application/xml
Request Body:
<neighbor xmlns="urn:opendaylight:params:xml:ns:yang:bgp:openconfig-extensions">
<neighbor-address>192.0.2.1</neighbor-address>
<afi-safis>
<afi-safi>
<afi-safi-name>LINKSTATE</afi-safi-name>
</afi-safi>
</afi-safis>
</neighbor>
Content-Type: application/json
Request Body:
{
"neighbor": [
{
"neighbor-address": "192.0.2.1",
"afi-safis": {
"afi-safi": [
{
"afi-safi-name": "LINKSTATE"
}
]
}
}
]
}
Link-State Route API¶
Following tree illustrate the BGP Link-State route structure.
:(linkstate-routes-case)
+--ro linkstate-routes
+--ro linkstate-route* [route-key path-id]
+--ro route-key string
+--ro path-id path-id
+--ro protocol-id protocol-id
+--ro identifier identifier
+--ro (object-type)?
| +--:(node-case)
| | +--ro node-descriptors
| | +--ro as-number? inet:as-number
| | +--ro area-id? area-identifier
| | +--ro domain-id? domain-identifier
| | +--ro (c-router-identifier)?
| | +--:(isis-node-case)
| | | +--ro isis-node
| | | +--ro iso-system-id netc:iso-system-identifier
| | +--:(isis-pseudonode-case)
| | | +--ro isis-pseudonode
| | | +--ro is-is-router-identifier
| | | | +--ro iso-system-id netc:iso-system-identifier
| | | +--ro psn uint8
| | +--:(ospf-node-case)
| | | +--ro ospf-node
| | | +--ro ospf-router-id uint32
| | +--:(ospf-pseudonode-case)
| | +--ro ospf-pseudonode
| | +--ro ospf-router-id uint32
| | +--ro lan-interface ospf-interface-identifier
| +--:(link-case)
| | +--ro local-node-descriptors
| | | +--ro as-number? inet:as-number
| | | +--ro area-id? area-identifier
| | | +--ro domain-id? domain-identifier
| | | +--ro (c-router-identifier)?
| | | | +--:(isis-node-case)
| | | | | +--ro isis-node
| | | | | +--ro iso-system-id netc:iso-system-identifier
| | | | +--:(isis-pseudonode-case)
| | | | | +--ro isis-pseudonode
| | | | | +--ro is-is-router-identifier
| | | | | | +--ro iso-system-id netc:iso-system-identifier
| | | | | +--ro psn uint8
| | | | +--:(ospf-node-case)
| | | | | +--ro ospf-node
| | | | | +--ro ospf-router-id uint32
| | | | +--:(ospf-pseudonode-case)
| | | | +--ro ospf-pseudonode
| | | | +--ro ospf-router-id uint32
| | | | +--ro lan-interface ospf-interface-identifier
| | | +--ro bgp-router-id? inet:ipv4-address
| | | +--ro member-asn? inet:as-number
| | +--ro remote-node-descriptors
| | | +--ro as-number? inet:as-number
| | | +--ro area-id? area-identifier
| | | +--ro domain-id? domain-identifier
| | | +--ro (c-router-identifier)?
| | | | +--:(isis-node-case)
| | | | | +--ro isis-node
| | | | | +--ro iso-system-id netc:iso-system-identifier
| | | | +--:(isis-pseudonode-case)
| | | | | +--ro isis-pseudonode
| | | | | +--ro is-is-router-identifier
| | | | | | +--ro iso-system-id netc:iso-system-identifier
| | | | | +--ro psn uint8
| | | | +--:(ospf-node-case)
| | | | | +--ro ospf-node
| | | | | +--ro ospf-router-id uint32
| | | | +--:(ospf-pseudonode-case)
| | | | +--ro ospf-pseudonode
| | | | +--ro ospf-router-id uint32
| | | | +--ro lan-interface ospf-interface-identifier
| | | +--ro bgp-router-id? inet:ipv4-address
| | | +--ro member-asn? inet:as-number
| | +--ro link-descriptors
| | +--ro link-local-identifier? uint32
| | +--ro link-remote-identifier? uint32
| | +--ro ipv4-interface-address? ipv4-interface-identifier
| | +--ro ipv6-interface-address? ipv6-interface-identifier
| | +--ro ipv4-neighbor-address? ipv4-interface-identifier
| | +--ro ipv6-neighbor-address? ipv6-interface-identifier
| | +--ro multi-topology-id? topology-identifier
| +--:(prefix-case)
| | +--ro advertising-node-descriptors
| | | +--ro as-number? inet:as-number
| | | +--ro area-id? area-identifier
| | | +--ro domain-id? domain-identifier
| | | +--ro (c-router-identifier)?
| | | +--:(isis-node-case)
| | | | +--ro isis-node
| | | | +--ro iso-system-id netc:iso-system-identifier
| | | +--:(isis-pseudonode-case)
| | | | +--ro isis-pseudonode
| | | | +--ro is-is-router-identifier
| | | | | +--ro iso-system-id netc:iso-system-identifier
| | | | +--ro psn uint8
| | | +--:(ospf-node-case)
| | | | +--ro ospf-node
| | | | +--ro ospf-router-id uint32
| | | +--:(ospf-pseudonode-case)
| | | +--ro ospf-pseudonode
| | | +--ro ospf-router-id uint32
| | | +--ro lan-interface ospf-interface-identifier
| | +--ro prefix-descriptors
| | +--ro multi-topology-id? topology-identifier
| | +--ro ospf-route-type? ospf-route-type
| | +--ro ip-reachability-information? inet:ip-prefix
| +--:(te-lsp-case)
| +--ro (address-family)?
| | +--:(ipv4-case)
| | | +--ro ipv4-tunnel-sender-address inet:ipv4-address
| | | +--ro ipv4-tunnel-endpoint-address inet:ipv4-address
| | +--:(ipv6-case)
| | +--ro ipv6-tunnel-sender-address inet:ipv6-address
| | +--ro ipv6-tunnel-endpoint-address inet:ipv6-address
| +--ro tunnel-id? rsvp:tunnel-id
| +--ro lsp-id? rsvp:lsp-id
+--ro attributes
+--ro (link-state-attribute)?
+--:(node-attributes-case)
| +--ro node-attributes
| +--ro topology-identifier* topology-identifier
| +--ro node-flags? node-flag-bits
| +--ro isis-area-id* isis-area-identifier
| +--ro dynamic-hostname? string
| +--ro ipv4-router-id? ipv4-router-identifier
| +--ro ipv6-router-id? ipv6-router-identifier
| +--ro sr-capabilities
| | +--ro mpls-ipv4? boolean
| | +--ro mpls-ipv6? boolean
| | +--ro sr-ipv6? boolean
| | +--ro range-size? uint32
| | +--ro (sid-label-index)?
| | +--:(local-label-case)
| | | +--ro local-label? netc:mpls-label
| | +--:(ipv6-address-case)
| | | +--ro ipv6-address? inet:ipv6-address
| | +--:(sid-case)
| | +--ro sid? uint32
| +--ro sr-algorithm
| +--ro algorithms* algorithm
+--:(link-attributes-case)
| +--ro link-attributes
| +--ro local-ipv4-router-id? ipv4-router-identifier
| +--ro local-ipv6-router-id? ipv6-router-identifier
| +--ro remote-ipv4-router-id? ipv4-router-identifier
| +--ro remote-ipv6-router-id? ipv6-router-identifier
| +--ro mpls-protocol? mpls-protocol-mask
| +--ro te-metric? netc:te-metric
| +--ro metric? netc:metric
| +--ro shared-risk-link-groups* rsvp:srlg-id
| +--ro link-name? string
| +--ro max-link-bandwidth? netc:bandwidth
| +--ro max-reservable-bandwidth? netc:bandwidth
| +--ro unreserved-bandwidth* [priority]
| | +--ro priority uint8
| | +--ro bandwidth? netc:bandwidth
| +--ro link-protection? link-protection-type
| +--ro admin-group? administrative-group
| +--ro sr-adj-ids*
| | +--ro (flags)?
| | | +--:(ospf-adj-flags-case)
| | | | +--ro backup? boolean
| | | | +--ro set? boolean
| | | +--:(isis-adj-flags-case)
| | | +--ro backup? boolean
| | | +--ro set? boolean
| | | +--ro address-family? boolean
| | +--ro weight? weight
| | +--ro (sid-label-index)?
| | +--:(local-label-case)
| | | +--ro local-label? netc:mpls-label
| | +--:(ipv6-address-case)
| | | +--ro ipv6-address? inet:ipv6-address
| | +--:(sid-case)
| | +--ro sid? uint32
| +--ro sr-lan-adj-ids*
| | +--ro (flags)?
| | | +--:(ospf-adj-flags-case)
| | | | +--ro backup? boolean
| | | | +--ro set? boolean
| | | +--:(isis-adj-flags-case)
| | | +--ro backup? boolean
| | | +--ro set? boolean
| | | +--ro address-family? boolean
| | +--ro weight? weight
| | +--ro iso-system-id? netc:iso-system-identifier
| | +--ro neighbor-id? inet:ipv4-address
| | +--ro (sid-label-index)?
| | +--:(local-label-case)
| | | +--ro local-label? netc:mpls-label
| | +--:(ipv6-address-case)
| | | +--ro ipv6-address? inet:ipv6-address
| | +--:(sid-case)
| | +--ro sid? uint32
| +--ro peer-node-sid
| | +--ro weight? weight
| | +--ro (sid-label-index)?
| | +--:(local-label-case)
| | | +--ro local-label? netc:mpls-label
| | +--:(ipv6-address-case)
| | | +--ro ipv6-address? inet:ipv6-address
| | +--:(sid-case)
| | +--ro sid? uint32
| +--ro peer-adj-sid
| | +--ro weight? weight
| | +--ro (sid-label-index)?
| | +--:(local-label-case)
| | | +--ro local-label? netc:mpls-label
| | +--:(ipv6-address-case)
| | | +--ro ipv6-address? inet:ipv6-address
| | +--:(sid-case)
| | +--ro sid? uint32
| +--ro peer-set-sids*
| +--ro weight? weight
| +--ro (sid-label-index)?
| +--:(local-label-case)
| | +--ro local-label? netc:mpls-label
| +--:(ipv6-address-case)
| | +--ro ipv6-address? inet:ipv6-address
| +--:(sid-case)
| +--ro sid? uint32
+--:(prefix-attributes-case)
| +--ro prefix-attributes
| +--ro igp-bits
| | x--ro up-down? bits
| | +--ro is-is-up-down? boolean
| | +--ro ospf-no-unicast? boolean
| | +--ro ospf-local-address? boolean
| | +--ro ospf-propagate-nssa? boolean
| +--ro route-tags* route-tag
| +--ro extended-tags* extended-route-tag
| +--ro prefix-metric? netc:igp-metric
| +--ro ospf-forwarding-address? inet:ip-address
| +--ro sr-prefix
| | +--ro (flags)?
| | | +--:(isis-prefix-flags-case)
| | | | +--ro no-php? boolean
| | | | +--ro explicit-null? boolean
| | | | +--ro readvertisement? boolean
| | | | +--ro node-sid? boolean
| | | +--:(ospf-prefix-flags-case)
| | | +--ro no-php? boolean
| | | +--ro explicit-null? boolean
| | | +--ro mapping-server? boolean
| | +--ro algorithm? algorithm
| | +--ro (sid-label-index)?
| | +--:(local-label-case)
| | | +--ro local-label? netc:mpls-label
| | +--:(ipv6-address-case)
| | | +--ro ipv6-address? inet:ipv6-address
| | +--:(sid-case)
| | +--ro sid? uint32
| +--ro ipv6-sr-prefix
| | +--ro algorithm? algorithm
| +--ro sr-range
| | +--ro inter-area? boolean
| | +--ro range-size? uint16
| | +--ro sub-tlvs*
| | +--ro (range-sub-tlv)?
| | +--:(binding-sid-tlv-case)
| | | +--ro weight? weight
| | | +--ro (flags)?
| | | | +--:(isis-binding-flags-case)
| | | | | +--ro address-family? boolean
| | | | | +--ro mirror-context? boolean
| | | | | +--ro spread-tlv? boolean
| | | | | +--ro leaked-from-level-2? boolean
| | | | | +--ro attached-flag? boolean
| | | | +--:(ospf-binding-flags-case)
| | | | +--ro mirroring? boolean
| | | +--ro binding-sub-tlvs*
| | | +--ro (binding-sub-tlv)?
| | | +--:(prefix-sid-case)
| | | | +--ro (flags)?
| | | | | +--:(isis-prefix-flags-case)
| | | | | | +--ro no-php? boolean
| | | | | | +--ro explicit-null? boolean
| | | | | | +--ro readvertisement? boolean
| | | | | | +--ro node-sid? boolean
| | | | | +--:(ospf-prefix-flags-case)
| | | | | +--ro no-php? boolean
| | | | | +--ro explicit-null? boolean
| | | | | +--ro mapping-server? boolean
| | | | +--ro algorithm? algorithm
| | | | +--ro (sid-label-index)?
| | | | +--:(local-label-case)
| | | | | +--ro local-label? netc:mpls-label
| | | | +--:(ipv6-address-case)
| | | | | +--ro ipv6-address? inet:ipv6-address
| | | | +--:(sid-case)
| | | | +--ro sid? uint32
| | | +--:(ipv6-prefix-sid-case)
| | | | +--ro algorithm? algorithm
| | | +--:(sid-label-case)
| | | | +--ro (sid-label-index)?
| | | | +--:(local-label-case)
| | | | | +--ro local-label? netc:mpls-label
| | | | +--:(ipv6-address-case)
| | | | | +--ro ipv6-address? inet:ipv6-address
| | | | +--:(sid-case)
| | | | +--ro sid? uint32
| | | +--:(ero-metric-case)
| | | | +--ro ero-metric? netc:te-metric
| | | +--:(ipv4-ero-case)
| | | | +--ro loose? boolean
| | | | +--ro address inet:ipv4-address
| | | +--:(ipv6-ero-case)
| | | | +--ro loose? boolean
| | | | +--ro address inet:ipv6-address
| | | +--:(unnumbered-interface-id-ero-case)
| | | | +--ro loose? boolean
| | | | +--ro router-id? uint32
| | | | +--ro interface-id? uint32
| | | +--:(ipv4-ero-backup-case)
| | | | +--ro loose? boolean
| | | | +--ro address inet:ipv4-address
| | | +--:(ipv6-ero-backup-case)
| | | | +--ro loose? boolean
| | | | +--ro address inet:ipv6-address
| | | +--:(unnumbered-interface-id-backup-ero-case)
| | | +--ro loose? boolean
| | | +--ro router-id? uint32
| | | +--ro interface-id? uint32
| | +--:(prefix-sid-tlv-case)
| | | +--ro (flags)?
| | | | +--:(isis-prefix-flags-case)
| | | | | +--ro no-php? boolean
| | | | | +--ro explicit-null? boolean
| | | | | +--ro readvertisement? boolean
| | | | | +--ro node-sid? boolean
| | | | +--:(ospf-prefix-flags-case)
| | | | +--ro no-php? boolean
| | | | +--ro explicit-null? boolean
| | | | +--ro mapping-server? boolean
| | | +--ro algorithm? algorithm
| | | +--ro (sid-label-index)?
| | | +--:(local-label-case)
| | | | +--ro local-label? netc:mpls-label
| | | +--:(ipv6-address-case)
| | | | +--ro ipv6-address? inet:ipv6-address
| | | +--:(sid-case)
| | | +--ro sid? uint32
| | +--:(ipv6-prefix-sid-tlv-case)
| | | +--ro algorithm? algorithm
| | +--:(sid-label-tlv-case)
| | +--ro (sid-label-index)?
| | +--:(local-label-case)
| | | +--ro local-label? netc:mpls-label
| | +--:(ipv6-address-case)
| | | +--ro ipv6-address? inet:ipv6-address
| | +--:(sid-case)
| | +--ro sid? uint32
| +--ro sr-binding-sid-labels*
| +--ro weight? weight
| +--ro (flags)?
| | +--:(isis-binding-flags-case)
| | | +--ro address-family? boolean
| | | +--ro mirror-context? boolean
| | | +--ro spread-tlv? boolean
| | | +--ro leaked-from-level-2? boolean
| | | +--ro attached-flag? boolean
| | +--:(ospf-binding-flags-case)
| | +--ro mirroring? boolean
| +--ro binding-sub-tlvs*
| +--ro (binding-sub-tlv)?
| +--:(prefix-sid-case)
| | +--ro (flags)?
| | | +--:(isis-prefix-flags-case)
| | | | +--ro no-php? boolean
| | | | +--ro explicit-null? boolean
| | | | +--ro readvertisement? boolean
| | | | +--ro node-sid? boolean
| | | +--:(ospf-prefix-flags-case)
| | | +--ro no-php? boolean
| | | +--ro explicit-null? boolean
| | | +--ro mapping-server? boolean
| | +--ro algorithm? algorithm
| | +--ro (sid-label-index)?
| | +--:(local-label-case)
| | | +--ro local-label? netc:mpls-label
| | +--:(ipv6-address-case)
| | | +--ro ipv6-address? inet:ipv6-address
| | +--:(sid-case)
| | +--ro sid? uint32
| +--:(ipv6-prefix-sid-case)
| | +--ro algorithm? algorithm
| +--:(sid-label-case)
| | +--ro (sid-label-index)?
| | +--:(local-label-case)
| | | +--ro local-label? netc:mpls-label
| | +--:(ipv6-address-case)
| | | +--ro ipv6-address? inet:ipv6-address
| | +--:(sid-case)
| | +--ro sid? uint32
| +--:(ero-metric-case)
| | +--ro ero-metric? netc:te-metric
| +--:(ipv4-ero-case)
| | +--ro loose? boolean
| | +--ro address inet:ipv4-address
| +--:(ipv6-ero-case)
| | +--ro loose? boolean
| | +--ro address inet:ipv6-address
| +--:(unnumbered-interface-id-ero-case)
| | +--ro loose? boolean
| | +--ro router-id? uint32
| | +--ro interface-id? uint32
| +--:(ipv4-ero-backup-case)
| | +--ro loose? boolean
| | +--ro address inet:ipv4-address
| +--:(ipv6-ero-backup-case)
| | +--ro loose? boolean
| | +--ro address inet:ipv6-address
| +--:(unnumbered-interface-id-backup-ero-case)
| +--ro loose? boolean
| +--ro router-id? uint32
| +--ro interface-id? uint32
x--:(te-lsp-attributes-case)
+--ro te-lsp-attributes
Usage¶
The Link-State table in a instance of the speaker’s Loc-RIB can be verified via REST:
URL: /rests/data/bgp-rib:bgp-rib/rib=bgp-example/loc-rib/tables=bgp-linkstate:linkstate-address-family,bgp-linkstate:linkstate-subsequent-address-family/linkstate-routes?content=nonconfig
Method: GET
Response Body:
<linkstate-routes xmlns="urn:opendaylight:params:xml:ns:yang:bgp-linkstate">
...
</linkstate-routes>
Response Body:
{
"bgp-linkstate:linkstate-routes": "..."
}
Note
Link-State routes mapping to topology links/nodes/prefixes is supported by BGP Topology Provider.