The MPLS SDP of type sr-isis with a far-end option using an IPv6 address is supported. Note the SDP must have the same IPv6 far-end address, used by the control plane for the T-LDP session, as the prefix of the node SID of the SR IPv6 tunnel.
configure
— service
— [no] sdp sdp-id mpls
— [no] far-end ipv6-address
— sr-isis
— no sr-isis
The bgp-tunnel, lsp, sr-te lsp, sr-ospf, and mixed-lsp-mode commands are blocked within the SDP configuration context when the far end is an IPv6 address.
SDP admin groups are not supported with an SDP using an SR IPv6 tunnel, or with SR-OSPF for IPv6 tunnels, and the attempt to assign them is blocked in the CLI.
Services that use LDP control plane such as T-LDP VPLS and R-VPLS, VLL, and IES/VPRN spoke interface have the spoke SDP (PW) signaled with an IPv6 T-LDP session because the far-end option is configured to an IPv6 address. The spoke SDP for these services binds to an SDP that uses an SR IPv6 tunnel where the prefix matches the far-end address. SR OS also supports the following:
the IPv6 PW control word with both data plane packets and VCCV OAM packets
hash label and entropy label, with the above services
network domains in VPLS
The PW switching feature is not supported with LDP IPv6 control planes. As a result, the CLI does not allow the user to enable the vc-switching option whenever one or both spoke SDPs uses an SDP that has the far-end configured as an IPv6 address.
L2 services that use BGP control plane such as dynamic MS-PW, BGP-AD VPLS, BGP-VPLS, BGP-VPWS, and EVPN MPLS cannot bind to an SR IPv6 tunnel because a BGP session to a BGP IPv6 peer does not support advertising an IPv6 next hop for the L2 NLRI. As a result, these services do not auto-generate SDPs using an SR IPv6 tunnel. In addition, they skip any provisioned SDPs with far-end configured to an IPv6 address when the use-provisioned-sdp option is enabled.
SR OS also supports multi homing with T-LDP active/standby FEC 128 spoke SDP using SR IPv6 tunnel to a VPLS/B-VPLS instance. BGP multi homing is not supported because BGP IPv6 does not support signaling an IPv6 next hop for the L2 NLRI.
The Shortest Path Bridging (SPB) feature works with spoke SDPs bound to an SDP that uses an SR IPv6 tunnel.