notes: EIGRP Miscellany

- donot update hop reachability (hub/spoke)

interface
no ip next-hop-self- eigrp AS#

used in a ccie scenario: hub and spoke topology , you will add this in the hub

- Prefix limitations
-neighbor maximum-prefix (#prefix) [options]
- Redistribute maximum-prefix (#prefix) [options]
- options include timers and minutes for resets

useful commands

show ip eigrp neigbhors

show ip eigrp topology (table/RIB)

show ip route eigrp routing table entrisy

EIGRP is very verbose in case something isnt working on a peer.

network commands can take mask info

network 10.1.1.0 0.0.0.0.255

and/0r use passive-interface default



-discovery of BB router AS# via debug

- use acl to look at eigrp only
access-list 101 permit ip any host 224.0.0.10
- then "debug ip packet 101 dump" to view hex dump value of header field
- find hex "E000000A" for 224.0.0.10 and skip ahead five 32-bits words.
- the fifth 32-bit word is the AS value sent or received (wacth debug direction)

* ip : source: d: 224.0.0.10, rcvd 2

find E000000A (224.0.0.10) and count 5 32 bit sections and that is the AS number.

hex 0x00000064 is 100 in decimal, so AS 100 is your other side's AS number.