show ip ospf retransmission-list

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Displays retransmission-list that is kept during synchronization of adjacent routers.

Syntax: show ip ospf retransmission-list neighbor interface

neighbor	IP address of the adjacent neighbor.
interface	Name of the interface.

Every time a router floods an advertisement, an entry is made on the retransmission list for each neighboring router that should have receivied a copy. This can be multiple neighbors on a broadcast network, but is only a single router on a point-to-point network.

This list is pruned when the adjacent router sends an acknowledgement for the advertisement. It is used to retransmit the advertisement to a neighbor in the event an acknowledgement is not received within a configured time interval. This mechanism provides for reliable flooding.

Use the show ip ospf retransmission-list neighbor interface command to display the retransmission list kept during synchronization of two adjacent routers.

Factory Default: None.

Command Mode: Executive and privileged.

Example: The following is sample output of the show ip ospf retransmission-list neighbor interface command:

router#show ip ospf retransmission-list 0.0.0.1 eth 1 Retransmission Queue length : 645 Type Adv ID Adv Router Age Sequence Chksum 1 0.0.0.2 0.0.0.2 32 0x80000001 cd94 1 0.0.0.2 0.0.0.2 26 0x80000001 a48d 1 0.0.0.225 0.0.0.225 32 0x80000001 39a7 1 0.0.0.224 0.0.0.224 32 0x80000001 7f89

The following describes the fields in the display:

Table 2-9. Fields Displayed by show ip ospf retransmission-list 

Field	Description
Adv ID	The ID of the advertisement. For each type of advertisement, a different type of address is used in this field. I - router: advertisement ID is the router-identifier. 2 - network: advertisement ID is the identifier for the designated router. 3 - network summary: advertisement ID is the network address. 4 - ASBR summary: advertisement ID is the router ID of the autonomous system border router. 5 - external network: advertisement ID is the network address of the advertised network.
Adv Router	The router that provided this advertisement.
Age	The age of the advertisement.
Sequence	Each LSA is given a sequence number by the originating router. The first LSA generated on each interface is given the sequence number 0x80000001. The sequence number is incremented with each LSA generated on an interface. The sequence number is a 32-bit value which wraps on overflows.
Chksum	The checksum of the LSA packet.

Related Commands: show ip ospf request-list
show ip ospf
show ip ospf border-routers
show ip ospf database
show ip ospf neighbor
show ospf virtual-links

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Avici® and TSR® is a registered trademark of Avici Systems Inc.
IPriori™, Composite Links™, SSR™, QSR, and NSR® are trademarks of Avici Systems Inc.

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    Last Updated: 05/10/04 at 16:34:58

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