EIGRP log Query

[Vijay Bhargav]

HI All,

I am getting the below error in my core devices. i wanted to know what exactly the value 520 mean in the below syslog

.Jun 16 16:12:20.419: %DUAL-5-NBRCHANGE: EIGRP-IPv4:(520) 10: Neighbor X.X.X.X (Vlan50) is down: holding time expired

.Jun 16 16:12:20.447: %DUAL-5-NBRCHANGE: EIGRP-IPv4:(520) 10: Neighbor X.X.X.X (Vlan50) is down: holding time expired

.Jun 16 16:12:20.587: %DUAL-5-NBRCHANGE: EIGRP-IPv4:(520) 10: Neighbor X.X.X.X (Vlan50) is up: new adjacency

.Jun 16 16:12:20.587: %DUAL-5-NBRCHANGE: EIGRP-IPv4:(520) 10: Neighbor X.X.X.X (Vlan50) is up: new adjacency

.Jun 16 16:12:20.795: %DUAL-5-NBRCHANGE: EIGRP-IPv4:(520) 10: Neighbor X.X.X.X (Port-channel1) is down: Interface PEER-TERMINATION received

.Jun 16 16:12:20.847: %DUAL-5-NBRCHANGE: EIGRP-IPv4:(520) 10: Neighbor X.X.X.X (Port-channel1) is up: new adjacency

.Jun 16 16:16:14.584: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/37, changed state to down

regards,

Vijay bhargav.R

[cadet alain]

Hi,

I think this is the AS number but I'm not 100% sure.

Regards

Alain

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[Vijay Bhargav]

HI Alain,

AS number is 10, which is displayed on the log as well

regards,

VB

[cadet alain]

Hi,

yep you're correct, some new pair of glasses couldn't hurt for me

Regards

Alain

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[Samil Lama]

Hello Vijay,

The "(520)" is the EIGRP DUAL Topology Database Table ID. It comes from a C struct called ddbtype_ that contains a member called ddb_name with a type of char and a length set by a #define that's currently 32. (for IPv4)

A comment on the ddb_name field definition in the struct says: "Name of protocol specific user of ddb".

A "ddb" is a DUAL Descriptor Block. It could be affected by the PDM (Protocol Dependent Module).

The structure of this message is:

LOG: EIGRP-ddb_name:(tableid) as_id: Neighbor address (interface)

In the case of %DUAL-5-NBRCHANGE: EIGRP-IPv4:(520) 10: Neighbor X.X.X.X (Port-channel1)

ddb_name- IPv4

tableid- internal ID for the RIB (520)

as_id- autonomous system ID (10)

address- IP address of the neighbor (X.X.X.X)

interface- Name of the interface (Port-channel-1)

This information comes from a personal research.

Regards.

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[cadet alain]

Hi,

I believe you deserve +5 for these great infos.

Regards

Alain

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[Samil Lama]

Hello Cadet,

Thanks for your rating.

Regards.

Please don't forget to rate helpful posts.