11-26-2008 03:12 AM - edited 03-04-2019 12:30 AM
Hi, I have an issue on an ATM router were the EIGRP adjacency are only forming in one direction.
The design is a hub and spoke, point to multipoint. The remote sites connect to the head end router via sub interfaces on the head end router. The issue I am seeing is that the remote site see the head end router as an EIGRP neighbour, however the head end router does not see the remote site as a neighbour, and as such no routing updates are passed.
The strange thing is, if I reboot the router, the EIGRP works fine until the Head end router's ATM drops
The config from the Head end router is
interface ATM0/0/0.30 multipoint
pvc 30/33
encapsulation aal5mux ppp Virtual-Template1
pvc 30/34
pvc 30/35 etc for all the sites
interface Virtual-Template1
ip unnumbered Loopback1
no peer default ip address
ppp authentication pap
Interface Loopback1
description ***Remote Sites WAN Interface***
ip address 192.168.227.1 255.255.255.0
router eigrp 1
redistribute connected
network 192.168.200.0
network 192.168.227.0
no auto-summary
The Config from the remote site ADSL router is
interface ATM0
no ip address
no atm ilmi-keepalive
dsl operating-mode ansi-dmt
!
interface ATM0.1 point-to-point
description **To Augres**
no snmp trap link-status
pvc 0/38
encapsulation aal5mux ppp dialer
dialer pool-member 1
!
!
interface ATM0.2 point-to-point
no snmp trap link-status
pvc 0/39
encapsulation aal5mux ppp dialer
dialer pool-member 2
interface Vlan1
ip address 192.168.25.1 255.255.255.0
hold-queue 100 out
!
interface Dialer1
bandwidth 512
ip unnumbered Loopback1
encapsulation ppp
dialer pool 1
dialer-group 1
ppp authentication pap callin
ppp pap sent-username xxxxx password xxxx
!
!
router eigrp 1
redistribute connected
network 192.168.25.0
network 192.168.227.0
network 192.168.229.10 0.0.0.0
auto-summary
eigrp stub connected summary
11-26-2008 04:22 AM
Hello Richard,
the remote site is point-to-point while the hub has a multipoint interface
I think for each pvc you need on the hub
pvc 30/34
protocol ip remote-side-loopback broadcast
this allow the router to map also EIGRP multicast hellos to the neighbors(s)
Hope to help
Giuseppe
11-26-2008 07:48 AM
Hi Giuseppe,
Thanks for the reply. Though it hasn't resolved the issue it has pointed me in the right direction to the underlying fault.
If I multicast ping from the head end router to the remote site, I get a reply back from all the remote sites. However if I carry out the same from the remote site I do not set any replies!.
Any other thoughts?
Regards
11-26-2008 08:14 AM
Hello Richard,
another possible option to get rid of multicast hellos is to use the neighbor command so that unicast messages are exchanged.
This is also a way to detect if the problem is with the multicast nature of Hellos
under router eigrp add
on hub
a neighbor ip-address for each remote
on remote
a single neighbor statement for hub
Hope to help
Giuseppe
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