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excessive eigrp hellos

pamirian76
Level 1
Level 1

hi,

we have this hub and spoke setup, so each spoke connects to 2 hubs. then with eigrp we decide which hub gets priority. simply by using an offset list and saying any route you give to this hub1 and learn from it add 10000000 to the distance so this makes hub2 the primary.

we run our hubs with asr 1001 routers btw.

now the problem I'm seeing on my spoke is this,

Feb 21 00:45:07.933: EIGRP: Received HELLO on Tunnel1 nbr 192.168.128.1

Feb 21 00:45:08.157: EIGRP: Received HELLO on Tunnel1 nbr 192.168.128.1

Feb 21 00:45:08.265: EIGRP: Received HELLO on Tunnel0 nbr 192.168.120.1

Feb 21 00:45:08.405: EIGRP: Received HELLO on Tunnel1 nbr 192.168.128.1

Feb 21 00:45:08.729: EIGRP: Received HELLO on Tunnel1 nbr 192.168.128.1

Feb 21 00:45:08.781: EIGRP: Received HELLO on Tunnel1 nbr 192.168.128.1

Feb 21 00:45:08.861: EIGRP: Received HELLO on Tunnel1 nbr 192.168.128.1

Feb 21 00:45:08.957: EIGRP: Received HELLO on Tunnel1 nbr 192.168.128.1

Feb 21 00:45:09.089: EIGRP: Received HELLO on Tunnel1 nbr 192.168.128.1

Feb 21 00:45:09.185: EIGRP: Received HELLO on Tunnel1 nbr 192.168.128.1

Feb 21 00:45:09.405: EIGRP: Received HELLO on Tunnel0 nbr 192.168.120.1

Feb 21 00:45:09.413: EIGRP: Received HELLO on Tunnel1 nbr 192.168.128.1

Feb 21 00:45:09.445: EIGRP: Received HELLO on Tunnel1 nbr 192.168.128.1

Feb 21 00:45:09.637: EIGRP: Received HELLO on Tunnel1 nbr 192.168.128.1

Feb 21 00:45:09.741: EIGRP: Received HELLO on Tunnel1 nbr 192.168.128.1

Feb 21 00:45:09.773: EIGRP: Received HELLO on Tunnel1 nbr 192.168.128.1

Feb 21 00:45:09.865: EIGRP: Received HELLO on Tunnel1 nbr 192.168.128.1

Feb 21 00:45:10.081: EIGRP: Received HELLO on Tunnel1 nbr 192.168.128.1

Feb 21 00:45:10.085: EIGRP: Received HELLO on Tunnel1 nbr 192.168.128.1

Feb 21 00:45:10.101: EIGRP: Received HELLO on Tunnel1 nbr 192.168.128.1

Feb 21 00:45:10.329: EIGRP: Received HELLO on Tunnel1 nbr 192.168.128.1

for some reason I'm bombarded or seems that way with hellos unless I'm interpreting this wrong... the output is from a

debug eigrp packets hello

this command clearly shows that my hello interval is 5 seconds and hold time is 15 on the hub. my tunnel1 on the spoke connects to this hub.

router#sh ip eigrp 76 interfaces detail

EIGRP-IPv4 Interfaces for AS(76)

                              Xmit Queue   PeerQ        Mean   Pacing Time   Multicast    Pending

Interface              Peers  Un/Reliable  Un/Reliable  SRTT   Un/Reliable   Flow Timer   Routes

Tu0                    305        0/0       0/2993        55       0/23         220           0

  Hello-interval is 5, Hold-time is 15

  Split-horizon is disabled

  Next xmit serial <none>

  Packetized sent/expedited: 352494/65952

  Hello's sent/expedited: 674057/180921

  Un/reliable mcasts: 0/136442  Un/reliable ucasts: 453228/2178270

  Mcast exceptions: 742876  CR packets: 127377  ACKs suppressed: 104189

  Retransmissions sent: 234364  Out-of-sequence rcvd: 43874

  Interface has all stub peers

  Next-hop-self disabled, next-hop info forwarded

  Topology-ids on interface - 0

  Authentication mode is md5,  key-chain is "EIGRPKEY"

has anyone seen this?

now this happens only with 1 of the hubs, the other hub does not send hellos like this. as you can see from the spoke output the other hub tun0 sends packets every 1 second... which is still weird because I have set hellos to 30 seconds and holdtime to 90 seconds and still my spoke gets spammed with hellos...

thoughts?

thanks.

2 Replies 2

Hello,

Are your eigrp neighbors flapping?

Can you apply debug eigrp packet and post the output

res

Paul

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Kind Regards
Paul

Hi there,
I would check your hubs again because it is at least unusual to see 305 peers on the other end of a tunnel. Possibly on the asr you are propagating the entire network hellos rather that EIGRP work itself with it. By the way, why are you using tunnels? Any load sharing? Post the design if you can

Hth
Alessio

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