From: Sean C (Upp_and_Upp@hotmail.com)
Date: Fri Apr 22 2005 - 13:30:58 GMT-3
Hello,
First, I want to thank InternetworkExpert for their excellent audio program on
preparing for the CCIE lab.
http://www.internetworkexpert.com/onlineclassroom.htm
One item mentioned in the audio program caught my attention and I have not
been able to duplicate it, nor have I found any supporting documentation on
Cisco, through Googling and the Groupstudy archives. During the Audio program
at about time mark @ 1:44:40, Brian Dennis mentions that a caveat of using
EIGRP key-chain is "... you can't use a neighbor statement". I'm at a loss
understanding this. I labbed up 2 routers, applied EIGRP, applied key-chains,
and then applied neighbor statements - from what I could see, the routers were
able to see each others as EIGRP neighbors and pass EIGRP prefixes. Did I
misunderstand something? Also, the audio mentions there is a specific order
of operations when applying EIGRP key-chain statements - does anyone have the
correct order? Perhaps I just got lucky with the order of operations when
configuring the
Thanks in advance,
Sean
================================
R2:
key chain TEST
key 1
key-string CISCO
!
interface Loopback102
ip address 172.16.102.1 255.255.255.0
!
interface Ethernet0
ip address 23.23.23.2 255.255.255.0
ip authentication mode eigrp 1 md5
ip authentication key-chain eigrp 1 TEST
!
router eigrp 1
network 23.23.23.0 0.0.0.255
network 172.16.102.0 0.0.0.255
neighbor 23.23.23.3 Ethernet0
======================================
R3:
key chain TEST
key 1
key-string CISCO
!
interface Loopback103
ip address 172.16.103.1 255.255.255.0
!
interface FastEthernet0/0
ip address 23.23.23.3 255.255.255.0
ip authentication mode eigrp 1 md5
ip authentication key-chain eigrp 1 TEST
!
router eigrp 1
network 23.23.23.0 0.0.0.255
network 172.16.103.0 0.0.0.255
neighbor 23.23.23.2 FastEthernet0/0
no auto-summary
======================================
r2#sh ip route eig
172.16.0.0/16 is variably subnetted, 7 subnets, 3 masks
D 172.16.103.0/24 [90/409600] via 23.23.23.3, 00:01:27, Ethernet0
r2#sh ip eig neig
IP-EIGRP neighbors for process 1
H Address Interface Hold Uptime SRTT RTO Q Seq Type
0 23.23.23.3 Et0 13 00:01:34 20 200 0 39 S
R3#sh ip rout eig
172.16.0.0/16 is variably subnetted, 7 subnets, 3 masks
D 172.16.102.0/24 [90/156160] via 23.23.23.2, 00:03:31, FastEthernet0/0
R3#sh ip eig neig
IP-EIGRP neighbors for process 1
H Address Interface Hold Uptime SRTT RTO Q Seq Type
0 23.23.23.2 Fa0/0 14 00:03:37 12 200 0 44 S
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