show ip ospf request-list

show ip ospf request-list

Displays request-list kept during synchronization of adjacent routers.

Syntax: show ip ospf request-list neighbor interface

neighbor

IP address of the adjacent neighbor.

interface

Name of the interface.

As two routers synchronize, they send all their database description packets to the adjacent router. Upon receipt of these packets, the routers add an entry to the request list for the neighbor of each advertisement that it either does not have or has an older instance.

Once the advertisements are received from the neighbor, this list is pruned until it is empty. This list is only used while two adjacent routers are synchronizing.

Use the show ip ospf request-list neighbor interface command to display the request 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 request-list neighbor interface command:

router#show ip ospf request-list 0.0.0.1 eth 1

Request 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 table describes the fields in the display:

Table 2-8. Fields Displayed by show ip ospf request-list
Field Description

Adv ID

The identifier 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 interfaces pos
show ip ospf
show ip ospf border-routers
show ip ospf database
show ip ospf neighbor
show ip ospf retransmission-list
show ospf virtual-links

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

router#show ip ospf request-list 0.0.0.1 eth 1 Request 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

**Table 2-8.** Fields Displayed by show ip ospf request-list
Field	Description
Adv ID	The identifier 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.

   Source File Name: ospf.fm
    HTML File Name: ospf28.html
    Last Updated: 05/10/04 at 16:34:58

show ip ospf request-list

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