Cisco Systems 12000/10700 V3.1.1 - page 476

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Cisco 12000/10700 v3.1.1 Router Manager User Guide
OL-4455-01
Chapter 15 MPLS Management
Fault Management for MPLS LDP
•hopCountAndPathVector—L oop Detection is supporte d by both Hop Count And Path Vector.
Since Loop Detection is determined during Session Initialization, an i ndividual session may not be
running wi th l oo p de tec tio n. Th i s ob ject sim ply g ives an ind ica tio n of w heth er or n ot the LSR ha s
the ability to support Loop Detection and which types.
General LDP Status
The General LDP Status area displays a table that displays information about the MPLS Label
Distribution Protocol Entities which exist on this Label Switch Router (LSR). An entry in this table
represents an LDP entity. An entry can be cr eated by a Network Administrator or by an SNMP agent as
instru cte d by LD P.
The table displays the following information:
Loca l L D P Id —Displays the LDP identifier.
Index—Thi s index is used as a se condary index to unique ly iden tify th is row.
Pro tocol Vers ion —The version number of the LDP protocol that will be used in the session initialization
message.
Admin Status—The administrative status of this LDP entity.
Operational Status—Th e o pe ra t io na l st at u s o f th is LDP en ti ty.
TCP Dsc Port—The TCP Discovery Port for LDP. The default value (646) is the well-known value of
this port.
UDP Dsc Port—The UDP Discovery Port for LDP. The default value (646) is the well-known value for
this port.
Maximum PDU Length—The maximum PDU Le ngth that is sen t in the Common Sessio n P arameters of
an Ini tial izat ion Messa ge . A value o f 255 or le ss sp ecifies th e default max imum l ength of 4 096 oct ets.
Keep Alive Hold Timer—The two octet value which is th e proposed keep alive hold tim er for this LDP
Entity.
Hello Hold Timer—The two octet value which is th e propos ed Hello ho ld time r for this LD P Entity. A
value of 0 means use the default, which is 15 seconds for Link Hellos and 45 seconds for T argeted Hellos.
A value of 65535 means infinite.
Init Session Threshold—When attempting to establish a session with a Peer , the gi ven LDP Entity should
send out the SNMP not ification, Ini t Session Threshol d, when the number of Session Initializa tion
messages se nt exceeds t his thre shold .
Label Distribution Method—For any given LDP session, the method of label distribution must be
specified (downstreamOnDemand, or downstreamUnsolicited).
Label Re te nti on Mo de —The LDP Entity can be configured to use either conserva tive or liber al label
retention mode. If the value of this object is conservative then advertised label mappings are retained
only if they will be used to forwar d packets, that is, if label came from a va lid next hop. If the value of
this object is liberal then all advertised label mappings are retained whether they are from a valid next
hop or not.
PVL—If the v alue of t his object i s 0 ( zero) then Lo op Dete ction f or P ath Vect ors is disabled . Other wise,
if this object has a v a lue gr eater than ze ro, then Loop De tection for P ath Vectors is e nabled , and the Pa th
Vector Lim it is this value.
HopCountLimit—Maxi mum allowable value for Hop count whe n Loop Detec tion using Hop Cou nters
as a metric.
Targ et Peer—If this LDP en tity uses targeted peer then set this to “true”.
Tar ge t Peer Ad dress Type—The type of the internetw or k layer add ress used for the Exte nded Disco v ery.