OT: Loopback [7:3973]
Hi, I have been looking at the sniffer output and found that my router keeps sending out a "LOOPBACK" packet whose source and dest mac address is the router interface itself. It is sent periodically at 10 sec interval. Any way to turn this off? Sorry that it is not a study question. Cheers, Chee Leong Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=3973&t=3973 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: OT: Loopback [7:3973]
Do you have an atm card in your router?
It sounds like to me, that you are seeing ATM OAM loopback cells every
10 seconds.
If you have an atm card in your router, I'd look for the following in
your configs:
atm pvc x x x aal5snap pir sir inarp oam 10
Your config may differ of course, but the point is, look at your atm
pvc config statement on the interface. You will see oam 10 in there
somewhere. Remove the oam 10 from the atm pvc, and this will disable
it.
HTH,
-Chuck
On 10 May 2001 06:27:34 -0400, [EMAIL PROTECTED] ("Tan Chee Leong")
wrote:
>Hi,
>
>I have been looking at the sniffer output and found that my router keeps
>sending out a "LOOPBACK" packet whose source and dest mac address is the
>router interface itself. It is sent periodically at 10 sec interval. Any
>way to turn this off?
>
>Sorry that it is not a study question.
>
>Cheers,
>Chee Leong
>FAQ, list archives, and subscription info:
http://www.groupstudy.com/list/cisco.html
>Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Message Posted at:
http://www.groupstudy.com/form/read.php?f=7&i=4113&t=3973
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Re: OT: Loopback [7:3973]
I'm believe that the loopbacks your are seeing are the keep-alive frames being sent out on the LAN. They should have the same source and destination MAC address with an ethertype 9000 or SNAP 9000 value. PS: you may want to verify the type/Snap value. 0x9000 is from memory. It's a good question. Everyone is bound to see them on the sniffers at some time. DaveC Tan Chee Leong wrote: > > Hi, > > I have been looking at the sniffer output and found that my router keeps > sending out a "LOOPBACK" packet whose source and dest mac address is the > router interface itself. It is sent periodically at 10 sec interval. Any > way to turn this off? > > Sorry that it is not a study question. > > Cheers, > Chee Leong > FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html > Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=4171&t=3973 -- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
