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diff --git a/docs/configuration/vrf/index.rst b/docs/configuration/vrf/index.rst index f475b7bf..4ec1d4df 100644 --- a/docs/configuration/vrf/index.rst +++ b/docs/configuration/vrf/index.rst @@ -317,5 +317,134 @@ VRF blue routing table C>* 10.20.0.0/24 is directly connected, eth2, 00:07:53 +##### +L3VPN VRFs +##### + +:abbr:`L3VPN VRFs ( Layer 3 Virtual Private Networks )` bgpd supports for +IPv4 RFC 4364 and IPv6 RFC 4659. L3VPN routes,and their associated VRF +MPLS labels, can be distributed to VPN SAFI neighbors in the default, i.e., +non VRF, BGP instance. VRF MPLS labels are reached using core MPLS labels +which are distributed using LDP or BGP labeled unicast. +bgpd also supports inter-VRF route leaking. + + +VRF Route Leaking +================== + +BGP routes may be leaked (i.e. copied) between a unicast VRF RIB and the VPN +SAFI RIB of the default VRF for use in MPLS-based L3VPNs. Unicast routes may +also be leaked between any VRFs (including the unicast RIB of the default BGP +instanced). A shortcut syntax is also available for specifying leaking from +one VRF to another VRF using the default instance’s VPN RIB as the intemediary +. A common application of the VRF-VRF feature is to connect a customer’s +private routing domain to a provider’s VPN service. Leaking is configured from +the point of view of an individual VRF: import refers to routes leaked from VPN +to a unicast VRF, whereas export refers to routes leaked from a unicast VRF to +VPN. + + +.. note:: Routes exported from a unicast VRF to the VPN RIB must be augmented + by two parameters: + + an RD / RTLIST + + Configuration for these exported routes must, at a minimum, specify + these two parameters. + +Configuration +============= + +Configuration of route leaking between a unicast VRF RIB and the VPN SAFI RIB +of the default VRF is accomplished via commands in the context of a VRF +address-family. + +.. cfgcmd:: set vrf name <name> protocols bgp address-family + <ipv4-unicast|ipv6-unicast> rd vpn export <asn:nn|address:nn> + + Specifies the route distinguisher to be added to a route exported from the + current unicast VRF to VPN.Create new VRF instance with `<name>`. The name + is used when placing individual interfaces into the VRF. + +.. cfgcmd:: set vrf name <name> protocols bgp address-family + <ipv4-unicast|ipv6-unicast> route-target vpn <import|export|both> + [RTLIST] + + Specifies the route-target list to be attached to a route (export) or the + route-target list to match against (import) when exporting/importing + between the current unicast VRF and VPN.The RTLIST is a space-separated + list of route-targets, which are BGP extended community values as + described in Extended Communities Attribute. + +.. cfgcmd:: set vrf name <name> protocols bgp address-family + <ipv4-unicast|ipv6-unicast> label vpn export <0-1048575|auto> + + Enables an MPLS label to be attached to a route exported from the current + unicast VRF to VPN. If the value specified is auto, the label value is + automatically assigned from a pool maintained. + +.. cfgcmd:: set vrf name <name> protocols bgp address-family + <ipv4-unicast|ipv6-unicast> route-map vpn <import|export> + [route-map <name>] + + Specifies an optional route-map to be applied to routes imported or + exported between the current unicast VRF and VPN. + +.. cfgcmd:: set vrf name <name> protocols bgp address-family + <ipv4-unicast|ipv6-unicast> <import|export> vpn + + Enables import or export of routes between the current unicast VRF and VPN. + +.. cfgcmd:: set vrf name <name> protocols bgp address-family + <ipv4-unicast|ipv6-unicast> import vrf <name> + + Shortcut syntax for specifying automatic leaking from vrf VRFNAME to the + current VRF using the VPN RIB as intermediary. The RD and RT are auto + derived and should not be specified explicitly for either the source or + destination VRF’s. + +Operation +========= + +It is not sufficient to only configure a L3VPN VRFs but L3VPN VRFs must be +maintained, too.For L3VPN VRF maintenance the following operational commands +are in place. + +.. opcmd:: show bgp <ipv4|ipv6> vpn + + Print active IPV4 or IPV6 routes advertised via the VPN SAFI. + + .. code-block:: none + + BGP table version is 2, local router ID is 10.0.1.1, vrf id 0 + Default local pref 100, local AS 65001 + Status codes: s suppressed, d damped, h history, * valid, > best, = multipath, + i internal, r RIB-failure, S Stale, R Removed + Nexthop codes: @NNN nexthop's vrf id, < announce-nh-self + Origin codes: i - IGP, e - EGP, ? - incomplete + + Network Next Hop Metric LocPrf Weight Path + Route Distinguisher: 10.50.50.1:1011 + *>i10.50.50.0/24 10.0.0.7 0 100 0 i + UN=10.0.0.7 EC{65035:1011} label=80 type=bgp, subtype=0 + Route Distinguisher: 10.60.60.1:1011 + *>i10.60.60.0/24 10.0.0.10 0 100 0 i + UN=10.0.0.10 EC{65035:1011} label=80 type=bgp, subtype=0 + +.. opcmd:: show bgp <ipv4|ipv6> vpn summary + + Print a summary of neighbor connections for the specified AFI/SAFI + combination. + + .. code-block:: none + + BGP router identifier 10.0.1.1, local AS number 65001 vrf-id 0 + BGP table version 0 + RIB entries 9, using 1728 bytes of memory + Peers 4, using 85 KiB of memory + Peer groups 1, using 64 bytes of memory + + Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd PfxSnt + 10.0.0.7 4 65001 2860 2870 0 0 0 1d23h34m 2 10 .. include:: /_include/common-references.txt |