From: Tarun Pahuja (pahujat@gmail.com)
Date: Wed Nov 28 2007 - 11:25:29 ART
Salau,
If the QOS policies applied on the interface are not optimal, it
can cause the interface queues to fill up and hence no control messages will
flow through the interface to keep the interface up. In your case if the Lmi
propagation is effected between the router and the frame switch the
interface would go down.
Something to investigate.
HTH,
Tarun
On Nov 28, 2007 6:05 AM, Salau, Yemi <yemi.salau@siemens.com> wrote:
> Hello Experts,
>
> As anyone come across issues where a serial connection (say s0/1) going
> down, tend to bring down another serial connection.
>
> The scenario is that, say RouterA has 2 serial interfaces s0/1 and s0/2.
> s0/1 is a ppp connection via a V100 satellite link, and s0/2 is a
> frame-relay connection with several subinterfaces ... Say
> s0/2.1,s0/2.2,s0/2.3,s0/2.4,s0/2.5 etc.
>
> The problem is, whenever s0/1 goes down, it takes s0/2 main interface
> down with it, which in turn take down all the sub-interfaces with it.
>
> Is there any reason why this should be, I'm guessing hardware related
> fault on the Hub Router, or a software bug ... Anyone come across this,
> please let me know.
>
> !
> interface Serial0/1
> bandwidth 512
> ip address A.B.C.D W.X.Y.Z
> encapsulation ppp
> ip route-cache flow
> no fair-queue
> no cdp enable
> !
>
> !
> interface Serial0/2
> bandwidth 2048
> no ip address
> encapsulation frame-relay IETF
> ip route-cache flow
> no ip route-cache cef
> frame-relay traffic-shaping
> frame-relay lmi-type ansi
> frame-relay interface-queue priority 10 20 30 40
> !
> interface Serial0/2.1 point-to-point
> bandwidth 128
> ip address B.B.C.D W.X.Y.Z
> no cdp enable
> frame-relay interface-dlci 1
> class 64k_cir_128k_bc
> !
> interface Serial0/2.2 point-to-point
> bandwidth 128
> ip address B.B.C.E W.X.Y.Z
> no cdp enable
> frame-relay interface-dlci 2
> class 64k_cir_128k_bc
> !
> interface Serial0/2.3 point-to-point
> bandwidth 128
> ip address B.B.C.F W.X.Y.Z
> no cdp enable
> frame-relay interface-dlci 3
> class 64k_cir_128k_bc
> !
> !
> interface Serial0/2.4 point-to-point
> bandwidth 128
> ip address B.B.C.G W.X.Y.Z
> no cdp enable
> frame-relay interface-dlci 4
> class 64k_cir_128k_bc
> !
> interface Serial0/2.5 point-to-point
> bandwidth 128
> ip address B.B.C.H W.X.Y.Z
> shutdown
> no cdp enable
> frame-relay interface-dlci 5
> class 64k_cir_128k_bc
> !
> interface Serial0/2.6 point-to-point
> bandwidth 256
> ip address B.B.C.I W.X.Y.Z
> no cdp enable
> frame-relay interface-dlci 6
> class 128k_cir_256k_bc
> !
> interface Serial0/2.7 point-to-point
> bandwidth 128
> ip address B.B.C.J W.X.Y.Z no cdp enable
> frame-relay de-group 1 7
> frame-relay interface-dlci 7 IETF
> class 64k_cir_128k_bc_inc_2_voice
> vofr data 4 call-control 5
> frame-relay payload-compression FRF9 stac
> !
> interface Serial0/2.8 point-to-point
> bandwidth 32
> no cdp enable
> frame-relay interface-dlci 8
> class 56k_cir_7k_bc_2_voice
> vofr data 5 call-control 4
> !
>
> Many Thanks
>
> Yemi Salau
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
This archive was generated by hypermail 2.1.4 : Sat Dec 01 2007 - 06:37:31 ART