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Beginner

Unicast EIGRP over Frame Relay

Hello,

 

I am having absolutely no luck making unicast EIGRP over frame relay work.

 

(This is for training purposes, and is NOT indicative of any kind of production network. I asked the same question over on learning network and have thus far gotten no answers that fix anything).

 

This is being done on a set of 2901's running IOS 15.3(2)T2. The frame switch is a 3745 running c3745-jk9s-mz.123-9a

 

The scenario is that I have three routers in a hub-and-spoke network

 

I am trying to implement unicast frame relay by setting the neighbors manually, allowing R4 and R2 to form an adjacency, even though they don't have a PVC.

I put static mappings in for everyting just to eliminate any question about mapping.

 

Here are the configurations:

 

FRS:

interface Serial3/2

description <[ S3/2 to R25 s0/0/0 ]>

no ip address

encapsulation frame-relay IETF

clockrate 128000

frame-relay lmi-type ansi

frame-relay intf-type dce

frame-relay route 41 interface Serial3/3 42

frame-relay route 43 interface Serial3/4 44

!

interface Serial3/3

description <[ S3/3 to R26 s0/0/0 ]>

no ip address

encapsulation frame-relay IETF

clockrate 128000

frame-relay lmi-type ansi

frame-relay intf-type dce

frame-relay route 42 interface Serial3/2 41

!

interface Serial3/4

description <[ s3/4 to R27 s0/2/0 ]>

no ip address

encapsulation frame-relay IETF

clockrate 128000

frame-relay lmi-type ansi

frame-relay intf-type dce

frame-relay route 44 interface Serial3/2 43

!

 

R1:

R1#sh run | se Serial0/0/0

interface Serial0/0/0

ip address 172.16.124.1 255.255.255.248

no ip split-horizon eigrp 1

encapsulation frame-relay IETF

frame-relay map ip 172.16.124.4 43 broadcast

frame-relay map ip 172.16.124.2 41 broadcast

neighbor 172.16.124.2 Serial0/0/0

neighbor 172.16.124.4 Serial0/0/0

R1#sh run | se eigrp

router eigrp 1

network 1.0.0.0

network 10.0.0.0

network 172.16.0.0

neighbor 172.16.124.2 Serial0/0/0

neighbor 172.16.124.4 Serial0/0/0

R1#

 

R2:

R2#sho run | se Serial0/0/0

interface Serial0/0/0

ip address 172.16.124.2 255.255.255.248

encapsulation frame-relay IETF

frame-relay map ip 172.16.124.4 42 broadcast

frame-relay map ip 172.16.124.1 42

neighbor 172.16.124.1 Serial0/0/0

neighbor 172.16.124.4 Serial0/0/0

R2#sho run | sec eigrp

router eigrp 1

network 2.0.0.0

network 10.0.0.0

network 172.16.0.0

neighbor 172.16.124.1 Serial0/0/0

neighbor 172.16.124.4 Serial0/0/0

R2#

 

R4::

R4#sh run | se Serial0/0/0

interface Serial0/0/0

ip address 172.16.124.4 255.255.255.248

encapsulation frame-relay IETF

frame-relay map ip 172.16.124.2 44 broadcast

frame-relay map ip 172.16.124.1 44

neighbor 172.16.124.1 Serial0/0/0

neighbor 172.16.124.2 Serial0/0/0

R4#sho run | se eigrp

router eigrp 1

network 4.0.0.0

network 10.0.0.0

network 172.16.0.0

neighbor 172.16.124.1 Serial0/0/0

neighbor 172.16.124.2 Serial0/0/0

R4#

 

The adjacency between R1 and R4 and R2 and R4 comes up with no problems, but R2 to R4 never comes up.

 

I used debug ip packet with an ACL specifying R2 and R4's s0/0/0 ip address as the source and destination, and I can see that that hellos are sent from R4, I can see that R1 gets them and re-routes them to R2, but R2 NEVER sees them. EIGRP between R1-R4 and R1-R2 is working, and I can ping back and forth between the R2 and R4 interfaces.

 

Here is R4 sending a Hello to R2 (debugging eigrp packets and frame-relay packets)

Apr  2 18:35:42.847: Serial0/0/0(o): dlci 44(0x8C1), NLPID 0x3CC(IP), datagramsize 64

Apr  2 18:35:42.847: EIGRP: Sending HELLO on Se0/0/0 - paklen 20 nbr 172.16.124.2

Apr  2 18:35:42.847:   AS 1, Flags 0x0:(NULL), Seq 0/0 interfaceQ 0/0 iidbQ un/rely 0/0

 

Here is the routing at R1 (debugging ip packets with an ACL and frame-relay packets)

Apr  2 18:35:42.856: FIBipv4-packet-proc: route packet from Serial0/0/0 src 172.16.124.4 dst 172.16.124.2

Apr  2 18:35:42.856: FIBfwd-proc: packet routed by adj to Serial0/0/0 172.16.124.2

Apr  2 18:35:42.856: FIBipv4-packet-proc: packet routing succeeded

Apr  2 18:35:42.856: Serial0/0/0(o): dlci 43(0x8B1), NLPID 0x3CC(IP), datagramsize 60

Apr  2 18:35:42.856: IP: s=172.16.124.4 (Serial0/0/0), d=172.16.124.2, len 60, input feature, proto=88, packet consumed, MCI Check(94), rtype 0, forus FALSE, sendself FALSE, mtu 0, fwdchk FALSE

 

And then there is NO OUTPUT at R2 from the IP packet or frame-relay packet debugs (it's seeing the hellos from R1, but not the hellos from R4).

 

Any suggestions would be greatly appreciated.

Everyone's tags (3)
2 REPLIES 2
Enthusiast

Hi riedmuellerI tried your

Hi riedmueller

I tried your topology on GNS3, it works fine. I've got neighborship established between R2 and R4 as shown in attached picture. Below the config (see topology.png for interface in use). I just changed interface numbers and add  "frame-relay switching" on FRS to your config. Have a look and let me know.

 

Bye

 

FRS#sh run
Building configuration...

Current configuration : 1590 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname FRS
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
memory-size iomem 5
no ip icmp rate-limit unreachable
ip cef
!
!
!
!
no ip domain lookup
!
frame-relay switching
multilink bundle-name authenticated
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
archive
 log config
  hidekeys
!
!
!
!
ip tcp synwait-time 5
!
!
!
!
interface FastEthernet0/0
 ip address 192.168.13.3 255.255.255.0
 duplex auto
 speed auto
!
interface Serial0/0
 description to R1
 no ip address
 encapsulation frame-relay IETF
 clock rate 128000
 frame-relay lmi-type ansi
 frame-relay intf-type dce
 frame-relay route 41 interface Serial0/1 42
 frame-relay route 43 interface Serial0/2 44
!
interface FastEthernet0/1
 ip address 192.168.23.3 255.255.255.0
 duplex auto
 speed auto
!
interface Serial0/1
 description to R2
 no ip address
 encapsulation frame-relay IETF
 clock rate 128000
 frame-relay lmi-type ansi
 frame-relay intf-type dce
 frame-relay route 42 interface Serial0/0 41
!
interface Serial0/2
 description to R4
 no ip address
 encapsulation frame-relay IETF
 clock rate 128000
 frame-relay lmi-type ansi
 frame-relay intf-type dce
 frame-relay route 44 interface Serial0/0 43
!
ip forward-protocol nd
!
!
no ip http server
no ip http secure-server
!
!
!
!
!
!
!
control-plane
!
!
!
!
!
!
!
!
!
!
line con 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
line aux 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
line vty 0 4
 login
!
!
end

 

 

R1#              sh run
Building configuration...

Current configuration : 1312 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R1
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
memory-size iomem 5
no ip icmp rate-limit unreachable
ip cef
!
!
!
!
no ip domain lookup
!
multilink bundle-name authenticated
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
archive
 log config
  hidekeys
!
!
!
!
ip tcp synwait-time 5
!
!
!
!
interface FastEthernet0/0
 ip address 192.168.12.1 255.255.255.0
 duplex auto
 speed auto
!
interface Serial0/0
 ip address 172.16.124.1 255.255.255.248
 ip hello-interval eigrp 1 5
 ip hold-time eigrp 1 15
 encapsulation frame-relay IETF
 no ip split-horizon eigrp 1
 clock rate 2000000
 frame-relay map ip 172.16.124.4 43 broadcast
 frame-relay map ip 172.16.124.2 41 broadcast
!
interface FastEthernet0/1
 ip address 192.168.13.1 255.255.255.0
 duplex auto
 speed auto
!
router eigrp 1
 network 1.0.0.0
 network 10.0.0.0
 network 172.16.0.0
 auto-summary
 neighbor 172.16.124.4 Serial0/0
!
ip forward-protocol nd
!
!
no ip http server
no ip http secure-server
!
!
!
!
!
!
!
control-plane
!
!
!
!
!
!
!
!
!
!
line con 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
line aux 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
line vty 0 4
 login
!
!
end

 

 

 

 

R2#sh run
Building configuration...

Current configuration : 1252 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R2
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
memory-size iomem 5
no ip icmp rate-limit unreachable
ip cef
!
!
!
!
no ip domain lookup
!
multilink bundle-name authenticated
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
archive
 log config
  hidekeys
!
!
!
!
ip tcp synwait-time 5
!
!
!
!
interface FastEthernet0/0
 ip address 192.168.12.2 255.255.255.0
 duplex auto
 speed auto
!
interface Serial0/0
 ip address 172.16.124.2 255.255.255.248
 encapsulation frame-relay IETF
 clock rate 2000000
 frame-relay map ip 172.16.124.4 42 broadcast
 frame-relay map ip 172.16.124.1 42
!
interface FastEthernet0/1
 ip address 192.168.23.2 255.255.255.0
 duplex auto
 speed auto
!
router eigrp 1
 network 2.0.0.0
 network 10.0.0.0
 network 172.16.0.0
 auto-summary
 neighbor 172.16.124.1 Serial0/0
 neighbor 172.16.124.4 Serial0/0
!
ip forward-protocol nd
!
!
no ip http server
no ip http secure-server
!
!
!
!
!
!
!
control-plane
!
!
!
!
!
!
!
!
!
!
line con 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
line aux 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
line vty 0 4
 login
!
!
end

 

 

 

 

 

 

 

 

R4#sh run
Building configuration...

Current configuration : 1224 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname R4
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
memory-size iomem 5
no ip icmp rate-limit unreachable
ip cef
!
!
!
!
no ip domain lookup
!
multilink bundle-name authenticated
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
archive
 log config
  hidekeys
!
!
!
!
ip tcp synwait-time 5
!
!
!
!
interface FastEthernet0/0
 no ip address
 shutdown
 duplex auto
 speed auto
!
interface Serial0/0
 ip address 172.16.124.4 255.255.255.248
 encapsulation frame-relay IETF
 clock rate 2000000
 frame-relay map ip 172.16.124.2 44 broadcast
 frame-relay map ip 172.16.124.1 44
!
interface FastEthernet0/1
 no ip address
 shutdown
 duplex auto
 speed auto
!
router eigrp 1
 network 4.0.0.0
 network 10.0.0.0
 network 172.16.0.0
 auto-summary
 neighbor 172.16.124.2 Serial0/0
 neighbor 172.16.124.1 Serial0/0
!
ip forward-protocol nd
!
!
no ip http server
no ip http secure-server
!
!
!
!
!
!
!
control-plane
!
!
!
!
!
!
!
!
!
!
line con 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
line aux 0
 exec-timeout 0 0
 privilege level 15
 logging synchronous
line vty 0 4
 login
!
!
end

 

 

 

 

Beginner

I am afraid it's a 15.3 thing

I am afraid it's a 15.3 thing, but I can't find any documentation. It seemed to work on 15.2 and I know it work(s)(ed) on 12.4, as you verified in GNS3. I was hoping someone could tell me it was an unresolved bug or 'caveat' in the 15.3(2)T2 release - the release notes don't mention this at all.

 

Thanks for taking a look though

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