MPLS Guide Label Distribution Protocol 
3HE 18686 AAAB TQZZA © 2022 Nokia.  
Use subject to Terms available at: www.nokia.com
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Description This command enables or disables IPv6 prefix FEC capability on the session or interface.
Default prefix-ipv6 disable
Parameters enable | disable  — enables or disables IPv6 prefix FEC capability 
tcp-session-parameters
Syntax tcp-session-parameters
Context config>router>ldp
Description This command enables the context to configure parameters for the TCP transport session of 
an LDP session to a remote peer.
Default n/a
peer-transport
Syntax [no] peer-transport ip-address
Context config>router>ldp>tcp-session-parameters
Description This command configures the peer transport address, which is the IPv4 or IPv6 destination 
address of the TCP connection to the LDP peer.
Default n/a
Parameters ip-address — the IPv4 or IPv6 address of the TCP connection to the LDP peer in dotted 
decimal notation
auth-keychain
Syntax auth-keychain name
no auth-keychain
Context config>router>ldp>tcp-session-params>peer-transport
Description This command associates an authentication keychain with LDP. The keychain is a collection 
of keys used to authenticate LDP messages from remote peers. The keychain allows the 
rollover of authentication keys during the lifetime of a session and also supports stronger 
authentication algorithms than clear text and MD5.
The keychain must already be defined in the config>system>security>keychain context.