EIGRP weird problem - receiving UPDATES but not HELLOs. Stumped.

Hi, I'm having a problem with a 3845 at work. One of its ethernet interfaces can't establish EIGRP neighbor relationships with routers in the same LAN. The odd thing is that I receive UPDATES from these routers, but do not receive any HELLOs. I'm really stumped, and I'd really appreciate any help.

In this piece of log, the 10.37.33.2 is one of the problematic routers. The 3845 is at 10.37.33.16

Nov 26 15:02:03.137: EIGRP: Neighbor(10.37.33.2) not yet found Nov 26 15:02:03.141: EIGRP: Received UPDATE on FastEthernet1/0 nbr

10.37.33.3 Nov 26 15:02:03.141: AS 10, Flags 0x1, Seq 2820840/0 idbQ 0/0 Nov 26 15:02:03.141: EIGRP: Neighbor(10.37.33.3) not yet found Nov 26 15:02:05.945: EIGRP: Packet from ourselves ignored Nov 26 15:02:06.657: EIGRP: Packet from ourselves ignored

fw3800-union#sh int fa 1/0 FastEthernet1/0 is up, line protocol is up Hardware is Fast Ethernet, address is 0012.0155.d974 (bia

0012.0155.d974) Description: Red de Antel Internet address is 10.37.33.16/24 MTU 1500 bytes, BW 10000 Kbit, DLY 100 usec, reliability 255/255, txload 1/255, rxload 1/255 Encapsulation ARPA, loopback not set Keepalive set (10 sec) Full-duplex, 10Mb/s ARP type: ARPA, ARP Timeout 04:00:00 Last input 00:00:01, output never, output hang never Last clearing of "show interface" counters never Input queue: 0/75/0/53 (size/max/drops/flushes); Total output drops: 0 Queueing strategy: fifo Output queue: 0/40 (size/max) 5 minute input rate 1000 bits/sec, 2 packets/sec 5 minute output rate 0 bits/sec, 0 packets/sec 2070875077 packets input, 2721775053 bytes, 0 no buffer Received 51592668 broadcasts, 0 runts, 0 giants, 0 throttles 431507 input errors, 92357 CRC, 84426 frame, 0 overrun, 0 ignored 0 input packets with dribble condition detected 117427790 packets output, 548951543 bytes, 0 underruns 126831 output errors, 328514 collisions, 30 interface resets 0 babbles, 0 late collision, 703595 deferred 0 lost carrier, 0 no carrier 0 output buffer failures, 0 output buffers swapped out

interface FastEthernet1/0 no switchport bandwidth 10000 ip address 10.37.33.16 255.255.255.0 ip virtual-reassembly duplex full speed 10 ids-service-module monitoring !

router eigrp 10 redistribute static redistribute eigrp 20 passive-interface IDS-Sensor2/0 passive-interface Vlan70 passive-interface Vlan110 passive-interface Vlan120 passive-interface Vlan130 network 10.0.0.0 no auto-summary !

Reply to
arraga
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Just for giggles, add 'network 10.37.33.16 0.0.0.255 to the eigrp config and see what happens. EIGRP processes match on both ends? I also see you redistributing another eigrp process into 10?

Reply to
Trendkill

It is solved now; 10.37.33.2 (a 6500) was running VTP in transparent mode, and was not sending multicasts. So the HELLOs did not get thru, while the UPDATEs, being unicast were recived.

Thanks for taking the time to look into this!

Reply to
arraga

Huh? Are you saying two different things, or are infering that a 6500 in VTP transparent mode stops multicasts? Doesn't sound related.

Reply to
Rob

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