Alcatel-Lucent 7450 - Page 604

LDP Adjacency Capabilities
Page 604 7450 ESS MPLS Guide
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|1|0| ADJ_CAPABILITY_TLV | Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| VENDOR_OUI |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|S| Reserved | |
+-+-+-+-+-+-+-+-+ +
| Adjacency capability elements |
+ +
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
The value of the U-bit for the TLV is set to 1 so that a receiver must silently ignore if the TLV is
deemed unknown.
The value of the F-bit is 0. After being advertised, this capability cannot be withdrawn; thus, the S-
bit is set to 1 in a hello message.
Adjacency capability elements are encoded as follows:
0 1 2 3 4 5 6 7
+-+-+-+-+-+-+-+-+
|D| CapFlag |
+-+-+-+-+-+-+-+-+
D bit: Controls the capability state.
1 : Disable capability
0 : Enable capability
CapFlag: The adjacency capability
1 : Prefix IPv4 forwarding
2 : Prefix IPv6 forwarding
3 : P2MP IPv4 forwarding
4 : P2MP IPv6 forwarding
5 : MP2MP IPv4 forwarding