From: Brian Dennis (bdennis@internetworkexpert.com)
Date: Sun Feb 04 2007 - 03:59:31 ART
Frame Relay end-to-end keepaliaves can not be used to bring down the
physical interface.
The physical interface with Frame Relay will be up/up as long as it is
receiving LMI from the Frame Relay switch and will not change to the
down state based on the status of a DLCI or with the use of Frame Relay
end-to-end keepalives. The logic is that if you brought the physical
interface down when a DLCI became inactive or keepalives were missed,
how would you ever be able to know when the DLCI becomes active
again or keepalives are starting to be received again?
--Brian Dennis, CCIE4 #2210 (R&S/ISP-Dial/Security/SP) bdennis@internetworkexpert.com Internetwork Expert, Inc. http://www.InternetworkExpert.com Toll Free: 877-224-8987 Direct: 775-745-6404 (Outside the US and Canada)
On 2/3/07 10:37 PM, "Mohammad Saeed" <mzsaeed@gmail.com> wrote:
> Hi, > > In the configuration below, if I configure backup interface on R4, and > end-to-end keepalives are configured on both R4 and R5, even if I > shutdown R5 S0, R4 does not know that other end is down, but if I put > backup interface command under S0.54 interface of R5, and shutdown > R4's S0, it quickly learns that Primary interface is down and it > brings up the backup interface UP. Now apprenatly as end-to-end > keepalives are configured on both routers, both shall be able to > learn, but R4 does not, can any one see the reason? > > R4 > > map-class frame-relay DLCI_405 > frame-relay end-to-end keepalive mode bidirectional > int s0 > frame-relay interface-dlci 405 > class DLCI_405 > backup interface s1 > > R5 > > map-class frame-relay DLCI_504 > frame-relay end-to-end keepalive mode bidirectional > int s0.54 point-to-point > frame-relay interface-dlci 504 > class DLCI_405 > int s1 > clock rate 64000 > > Regards, > > Mohammad Zahed Saeed > > _______________________________________________________________________ > Subscription information may be found at: > http://www.groupstudy.com/list/CCIELab.html
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