From: Brian Hescock (bhescock@xxxxxxxxx)
Date: Tue Jan 23 2001 - 12:31:19 GMT-3
MGeatti,
Let's go back to one point that was made earlier when it was said
the first (and only hello) was dropped. The hold time should be three
times the hello interval so you should always send three hello's in
both directions. Only if you don't receive any hello's at all during that
period would eigrp neighbors drop. Slow speed links (T1 and lower) will
have the timers set at 60 / 180. So if you increased the timers to be 120
/ 180 that would be a bad thing because only two hello's would be
sent. You would want to change it to be 120 / 360. So if you only had
one hello sent then the config sounds really broken. Make the hold time
three times the hello interval and configure it the same way on both sides
of the link.
Brian
On 23 Jan 2001, Shaun Nicholson wrote:
> Have you tried setting a hold queue on your ISDN.
> That will cause the packets to wait for the line to come up in a buffer.
>
> Thanks
> Shaun Nicholson CCIE 6705
> Lead Network Engineer
> Kaiser Permanente
> Silver Spring Data Center
> 301 680 1462
>
>
>
>
> MGeatti@msdinc.com on 01/23/2001 09:49:00 AM
> To: ccielab@groupstudy.com@Internet
> cc: (bcc: Shaun Nicholson/MD/KAIPERM)
> Subject: EIGRP/VPN question
>
> I have a GRE tunnel between 2 routers. Between the 2 routers I also have 1
> serial and 1 isdn interface. The isdn is set up to do ddr with OSPF when the
> serial goes down. Now I want to put EIGRP on the tunnel interfaces only.
> This keeps the isdn up when the serial is down due to routing updates. I
> tried to change the timers on EIGRP - hello and hold. This worked for a
> while but eigrp neighbors dropped as hellos are not properly passed. I think
> what is happening is that the first (and only hello) is dropped because of
> the delay in line coming up. If I could only keep that packet there waiting
> for .5 of a second it would work.
> Any ideas or other solutions.
>
> Thanks.
>
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