From: Justin Menga (Justin.Menga@xxxxxxxxxxxxxxxxxx)
Date: Wed Jan 31 2001 - 08:53:24 GMT-3
Poll-interval relates to if an OSPF neighbor 'dies'. If a neighbor doesn't
send a Hello within the Dead timer, the neighbor is considered dead. Once
this occurs, the router will send hellos at the poll-interval rate (e.g.
180s) rather than at the interfaces normal Hello timer (NBMA = 30s).
Obviously, this reduces WAN traffic whilst still allowing the adjacency to
re-establish when the dead neighbor 'rises again'....
The recommendation is that this value is much higher than the Hello interval
(for bandwidth purposes), but too high and convergence could be slow...
Regards,
Justin Menga CCIE #6640 MCSE+I CCSE
WAN Specialist
Computerland New Zealand
PO Box 3631, Auckland
DDI: (+64) 9 360 4864 Mobile: (+64) 25 349 599
mailto: justin.menga@computerland.co.nz
-----Original Message-----
From: Maness, Drew [mailto:drew.maness@veritect.com]
Sent: Wednesday, January 31, 2001 12:31 PM
To: ccielab@groupstudy.com
Subject: CCIEBOOT Lab 1 OSPF Poll-interval
Hey gang,
I finished Lab 1 a while ago but something always bothered me about
cciebootcamps OSPF config on r1.
They list the config for OSPF as:
router ospf 1
...
neighbor 10.10.1.2 priority 1 poll-interval 180
neighbor 10.10.1.3 priority 1 poll-interval 180
neighbor 10.10.1.5 priority 1 poll-interval 180
I understand from their (cciebootcamp) website that the priority should be 0
but why do they change the poll-interval to 180? Does it have a purpose or
is it 180 because all of Cisco's documentation list the poll-interval as
180?
Just something that has been bothering me.
Thanks all
Drew
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