EIGRP Timers

EIGRP sends hello packets every 5 seconds on high bandwidth links and every 60 seconds on low bandwidth multipoint links.

  • 5-second hello:

    • broadcast media, such as Ethernet, Token Ring, and FDDI

    • point-to-point serial links, such as PPP or HDLC leased circuits, Frame Relay point-to-point subinterfaces, and ATM point-to-point subinterface

    • high bandwidth (greater than T1) multipoint circuits, such as ISDN PRI and Frame Relay

  • 60-second hello:

    • multipoint circuits T1 bandwidth or slower, such as Frame Relay multipoint interfaces, ATM multipoint interfaces, ATM switched virtual circuits, and ISDN BRIs

  • To change the timers issue these commands on the interfaces.
  • ip hello-interval eigrp
  • ip hold-time eigrp

Comments

Post a Comment

Popular posts from this blog

BGP Communities

Community Attribute The community attribute provides a way of grouping destinations, called communities, to which routing decisions (such as acceptance, preference, and redistribution) can be applied. Use route-maps to set them. no-export - Do not advertise this route to EBGP peers. no-advertise - Do not advertise this route to any peer. internet - Advertise this route to the Internet community; all routers in the network belong to it.
Read more

Hector Runs Over a Cat

Image
Hector informed me today that he ran over a cat. I asked him if he stopped and he said "I slowed down". I asked him if he was going to bury it but he would not. I then gave him a ride home and pulled up next to the 3 day dead mangled cat and Hector wouldnt look at it. I took a picture and MMS him so he could see what he had done to this poor defenseless animal. I offered to help him bury it but he just seems so callus. I am posting this picture to try to get Hector to help me bury this cat. Please post your thoughts and suggestion for Hector. I think he just needs a hug.
Read more

EIGRP Adjaceny Authentication

1st thing first. With any Authentication you must set your clock to be the same on every router. clock set 10:21:00 April 4 2010 Next create your keychain (Key Number must Match) key chain EIGRP key 1 key-string CISCO123 Next apply your keychain Go to the interface you want to authenticate and specify that you want authentication to be used. ip authentication mode eigrp 100 md5 (This turns on authentication) Next identify the keychain you wish to use. ip authentication key-chain eigrp 100 EIGRP ****Extra Options**** ! key chain EIGRP key 1 key-string CISCO123 accept-lifetime 00:00:00 Jan 1 1993 00:15:00 Jan 1 2007 send-lifetime 00:00:00 Jan 1 1993 00:00:00 Jan 1 2007 key 2 key-string CISCO456 accept-lifetime 23:45:00 Dec 31 2006 infinite send-lifetime 00:00:00 Jan 1 2007 infinite !
Read more