Oam Support With Ldp Ipv6 - Nokia 7705 SAR-W Series Manual

MPLS Guide

5.4.11 OAM Support with LDP IPv6

MPLS OAM tools LSP ping and LSP trace can operate with LDP IPv6 and support
the following:
The behavior at the sender and receiver nodes supports both LDP IPv4 and IPv6
target FEC stack TLVs. Specifically:
VCCV ping and VCCV trace for a single-hop PW support IPv6 PW FEC 128, as per
RFC 6829. In addition, the PW OAM control word is supported with VCCV packets
when the control-word option is enabled on the spoke SDP configuration. When the
value of the Channel Type field is set to 0x57, it indicates that the Associated
Channel carries an IPv6 packet, as per RFC 4385.
3HE 18686 AAAB TQZZA
• use of IPv6 addresses in the echo request and echo reply messages, including
in DSMAP TLV, as per RFC 4379
• use of LDP IPv6 prefix target FEC stack TLV, as per RFC 4379
• use of IPv6 addresses in the DDMAP TLV and FEC stack change sub-TLV, as
per RFC 6424
• use of 127/8 IPv4 mapped IPv6 address; that is, in the range ::ffff:127/104, as
the destination address of the echo request message, as per RFC 4379
• use of 127/8 IPv4 mapped IPv6 address; that is, in the range ::ffff:127/104, as
the path-destination address when the user wants to exercise a specific LDP
ECMP path
• The IP family (IPv4/IPv6) of the UDP/IP echo request message will always
match the family of the LDP target FEC stack TLV as entered by the user in the
prefix option.
• The src-ip-address option is extended to accept IPv6 address of the sender
node. If the user did not enter a source IP address, the system IPv6 address will
be used. If the user entered a source IP address of a different family than the
LDP target FEC stack TLV, an error is returned and the command is aborted.
• The IP family of the UDP/IP echo reply message must match that of the received
echo request message.
• For lsp-trace, the downstream information in DSMAP/DDMAP will be encoded
as the same family as the LDP control plane of the link LDP or targeted LDP
session to the downstream peer.
• The sender node inserts the experimental value of 65503 in the Router Alert
Option in the echo request packet IPv6 header, as per RFC 5350. Once a value
is allocated by IANA for MPLS OAM as part of draft-ietf-mpls-oam-ipv6-rao, it
will be updated.
Use subject to Terms available at: www.nokia.com
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