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doc: L3vpn: settings
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@ -317,5 +317,134 @@ VRF blue routing table
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C>* 10.20.0.0/24 is directly connected, eth2, 00:07:53
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C>* 10.20.0.0/24 is directly connected, eth2, 00:07:53
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#####
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L3VPN VRFs
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#####
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:abbr:`L3VPN VRFs ( Layer 3 Virtual Private Networks )` bgpd supports for
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IPv4 RFC 4364 and IPv6 RFC 4659. L3VPN routes,and their associated VRF
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MPLS labels, can be distributed to VPN SAFI neighbors in the default, i.e.,
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non VRF, BGP instance. VRF MPLS labels are reached using core MPLS labels
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which are distributed using LDP or BGP labeled unicast.
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bgpd also supports inter-VRF route leaking.
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VRF Route Leaking
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==================
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BGP routes may be leaked (i.e. copied) between a unicast VRF RIB and the VPN
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SAFI RIB of the default VRF for use in MPLS-based L3VPNs. Unicast routes may
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also be leaked between any VRFs (including the unicast RIB of the default BGP
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instanced). A shortcut syntax is also available for specifying leaking from
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one VRF to another VRF using the default instance’s VPN RIB as the intemediary
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. A common application of the VRF-VRF feature is to connect a customer’s
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private routing domain to a provider’s VPN service. Leaking is configured from
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the point of view of an individual VRF: import refers to routes leaked from VPN
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to a unicast VRF, whereas export refers to routes leaked from a unicast VRF to
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VPN.
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.. note:: Routes exported from a unicast VRF to the VPN RIB must be augmented
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by two parameters:
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an RD / RTLIST
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Configuration for these exported routes must, at a minimum, specify
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these two parameters.
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Configuration
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=============
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Configuration of route leaking between a unicast VRF RIB and the VPN SAFI RIB
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of the default VRF is accomplished via commands in the context of a VRF
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address-family.
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.. cfgcmd:: set vrf name <name> protocols bgp address-family
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<ipv4-unicast|ipv6-unicast> rd vpn export <asn:nn|address:nn>
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Specifies the route distinguisher to be added to a route exported from the
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current unicast VRF to VPN.Create new VRF instance with `<name>`. The name
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is used when placing individual interfaces into the VRF.
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.. cfgcmd:: set vrf name <name> protocols bgp address-family
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<ipv4-unicast|ipv6-unicast> route-target vpn <import|export|both>
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[RTLIST]
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Specifies the route-target list to be attached to a route (export) or the
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route-target list to match against (import) when exporting/importing
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between the current unicast VRF and VPN.The RTLIST is a space-separated
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list of route-targets, which are BGP extended community values as
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described in Extended Communities Attribute.
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.. cfgcmd:: set vrf name <name> protocols bgp address-family
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<ipv4-unicast|ipv6-unicast> label vpn export <0-1048575|auto>
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Enables an MPLS label to be attached to a route exported from the current
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unicast VRF to VPN. If the value specified is auto, the label value is
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automatically assigned from a pool maintained.
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.. cfgcmd:: set vrf name <name> protocols bgp address-family
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<ipv4-unicast|ipv6-unicast> route-map vpn <import|export>
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[route-map <name>]
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Specifies an optional route-map to be applied to routes imported or
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exported between the current unicast VRF and VPN.
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.. cfgcmd:: set vrf name <name> protocols bgp address-family
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<ipv4-unicast|ipv6-unicast> <import|export> vpn
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Enables import or export of routes between the current unicast VRF and VPN.
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.. cfgcmd:: set vrf name <name> protocols bgp address-family
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<ipv4-unicast|ipv6-unicast> import vrf <name>
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Shortcut syntax for specifying automatic leaking from vrf VRFNAME to the
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current VRF using the VPN RIB as intermediary. The RD and RT are auto
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derived and should not be specified explicitly for either the source or
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destination VRF’s.
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Operation
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=========
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It is not sufficient to only configure a L3VPN VRFs but L3VPN VRFs must be
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maintained, too.For L3VPN VRF maintenance the following operational commands
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are in place.
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.. opcmd:: show bgp <ipv4|ipv6> vpn
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Print active IPV4 or IPV6 routes advertised via the VPN SAFI.
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.. code-block:: none
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BGP table version is 2, local router ID is 10.0.1.1, vrf id 0
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Default local pref 100, local AS 65001
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Status codes: s suppressed, d damped, h history, * valid, > best, = multipath,
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i internal, r RIB-failure, S Stale, R Removed
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Nexthop codes: @NNN nexthop's vrf id, < announce-nh-self
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Origin codes: i - IGP, e - EGP, ? - incomplete
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Network Next Hop Metric LocPrf Weight Path
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Route Distinguisher: 10.50.50.1:1011
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*>i10.50.50.0/24 10.0.0.7 0 100 0 i
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UN=10.0.0.7 EC{65035:1011} label=80 type=bgp, subtype=0
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Route Distinguisher: 10.60.60.1:1011
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*>i10.60.60.0/24 10.0.0.10 0 100 0 i
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UN=10.0.0.10 EC{65035:1011} label=80 type=bgp, subtype=0
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.. opcmd:: show bgp <ipv4|ipv6> vpn summary
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Print a summary of neighbor connections for the specified AFI/SAFI
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combination.
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.. code-block:: none
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BGP router identifier 10.0.1.1, local AS number 65001 vrf-id 0
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BGP table version 0
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RIB entries 9, using 1728 bytes of memory
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Peers 4, using 85 KiB of memory
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Peer groups 1, using 64 bytes of memory
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Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd PfxSnt
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10.0.0.7 4 65001 2860 2870 0 0 0 1d23h34m 2 10
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.. include:: /_include/common-references.txt
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.. include:: /_include/common-references.txt
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