Lab Routers Not starting eigrp routing process

[rbsims]

I have three 2500 series routers. I configure them for "router eigrp 100". I do a sh ip proto and all say they are running eigrp 100 and advertising the configured networks. I do a sh ip route and no eigrp routes are in the table.

I do a de bug eigrp nei, and get no output.

If I do a sh cdp nei, all the routers are aware of each other.

I am completely confused. If anyone has any idea how I can approac this issue, I will be forever grateful.

thanks

 

[dgrizzard]

Could you post your config on one of the routers (change your ip info of course)?

 

[chipk]

Do you have static routes or other routing protocols running as well?

 

[rbsims]

I will send the config along tonight. The lab is at home. If you have a suggested config I have no problem starting from scratch.

The only static route I have configured is the default route 0.0.0.0 0.0.0.0 s0

Thanks so much for your help

 

[rbsims]

R2#sh run
Building configuration...

Current configuration : 846 bytes
!
version 12.1
no service single-slot-reload-enable
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname R2
!
enable secret 5 $1$lKb1$e.NjGKnvV3pdcXza48Yqn0
enable password cisco
!
username rob
!
!
!
!
ip subnet-zero
no ip domain-lookup
!
!
!
!
interface Loopback0
ip address 172.16.6.1 255.255.255.0
!
interface Ethernet0
ip address 172.16.5.1 255.255.255.0
!
interface Serial0
ip address 172.16.2.2 255.255.255.0
no fair-queue
!
interface Serial1
ip address 172.16.1.2 255.255.255.0
!
router eigrp 100
network 172.16.5.0 0.0.0.255
network 172.16.6.0 0.0.0.255
no auto-summary
no eigrp log-neighbor-changes
!
ip classless
ip http server
!
banner login ^C If your not Rob, PUSH OFF ^C
alias exec s sh ip int bri
alias exec r ah ip proto
!
line con 0
line aux 0
line vty 0 4
login
!
end

R2#sh cdp nei
Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge
S - Switch, H - Host, I - IGMP, r - Repeater

Device ID Local Intrfce Holdtme Capability Platform Port ID
SW1 Eth 0 171 T S 1900 1
r3 Ser 0 125 R 2500 Ser 0
R1 Ser 1 123 R 2500 Ser 1
R2#sho ip proto
Routing Protocol is "eigrp 100"
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
Default networks flagged in outgoing updates
Default networks accepted from incoming updates
EIGRP metric weight K1=1, K2=0, K3=1, K4=0, K5=0
EIGRP maximum hopcount 100
EIGRP maximum metric variance 1
Redistributing: eigrp 100
Automatic network summarization is not in effect
Maximum path: 4
Routing for Networks:
172.16.5.0/24
172.16.6.0/24
Routing Information Sources:
Gateway Distance Last Update
Distance: internal 90 external 170

 

[brianinms]

The problem is that you aren't sending advertisements out the serial interfaces.


It should be

router eigrp 100
network 172.16.2.0 0.0.0.255
network 172.16.1.0 0.0.0.255
no auto-sum

 

[vipergg]

Yup no network statements for your serial line subnets , add those and it should pop right up .

 

[UCAtech]

agreed... btw, love the banner

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Technical Writer/Programer/Student
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[rbsims]

That was it!! Thanks for your help. I guess I assumed that the serial links would be auto detected, wrong.

Thanks again

 

[BrandonSwag]

Just a thought could of rbsims applied a larger subnet and been ok too like this.

router eigrp 100
network 172.16.0.0 255.255.0.0

 

[t0mm0]

BrandonSwag

I think you mean;

router eigrp 100
network 172.16.0.0 0.0.255.255

 

[burtsbees]

I don't know if he could have, with the "no auto-summary" on the routing process...never tried that one...
But your thought process is on...

Burt

 

[vipergg]

the answer is yes the larger network statement will work , this just means any interface that begins with 172.16. will be put into the eigrp routing process , the way he has it now he has the smaller subnet statements which will work but just more typing to put in all the separate statements instead of the all encompassing 172.16.0.0

 

[vipergg]

Also when using a loopback you always use a 32 bit mask ,
Didn't see a net statement for your loopback address either . You wouldn't be able to route to the loopback or use it for a router id for eigrp . A loopback is virtual interface that never goes down so it is a good idea use this when using routing protocols.

ip address 172.16.6.1 255.255.255.255


network statement
network 172.16.6.1 0.0.0.0

 

[jneiberger]

Remember that the network statement in EIGRP works differently than the one in, say, BGP. In EIGRP, the network statement specifies which interfaces will participate in EIGRP, not which networks will be advertised.

 

[burtsbees]

Yes, thank you...that's right.

Burt

 

[brianinms]

Jneiberger is correct.... hence why I only listed the networks for the serial interfaces.

 

[jneiberger]

Exactly, Brian. I just wanted to clarify for the OP who might not have understood exactly what was happening.