From: Pal (palsehmi@googlemail.com)
Date: Wed Mar 29 2006 - 14:52:39 GMT-3
Perhaps its a case of VT assignments? If you shutdown the interface on R4
does the flapping between R3-R5 stop? Does the connectivity between R3 and
R5 then 'appear' stable?
It maybe worth trying distinct ML interfaces on the hub that have their own
VT respectively. Each VT is referenced could then be referenced by the two
serial sub interfaces that carry the traffic to the same router - two for R4
and the two for R5.
R3
ML1 - VT1 - Sx.1 PVC 304
ML1 - VT1 - Sx.2 PVC 304
ML2 - VT2 - Sx.1 PVC 304
ML2 - VT2 - Sx.2 PVC 304
Perhaps also worth noting that there are no issues with repeating IP
addresses on MLs.
HTH
On 29/03/06, m destienne <mdestienne@yahoo.com> wrote:
>
> i see that you have only one virtual template defined
> but listed twice. and this one is being used by both
> frame interfaces.
>
> is that a typo or should the second virtual template
> be virtual-template2 and used by the second frame
> interface..
>
> this way, you would have two virtual templates in the
> mlppp config instead of just one.
>
> also, verify that the flapping messages are bogus by
> checking the serial interfaces when you receive the
> down messages regarding your mlppp.
>
> --- Bill.McKenzie@bisys.com wrote:
>
> > IE Core Lab 6:
> >
> > configuring PPPoFR with multilink interfaces
> >
> > Routers 3 and 4 can communicate no problem. Router
> > 5's multilink interface
> > is constantly going up and down. The configuration
> > (except for interface
> > number) is the same on all three routers.
> >
> > Here is the config on the suspect router (R5)
> >
> > interface Serial1/0
> > no ip address
> > encapsulation frame-relay
> > frame-relay lmi-type cisco
> > !
> > interface Serial1/0.503 point-to-point
> > frame-relay interface-dlci 503 ppp
> > Virtual-Template1
> > !
> > interface Serial1/0.513 point-to-point
> > frame-relay interface-dlci 513 ppp
> > Virtual-Template1
> > !
> >
> > interface Virtual-Template1
> > no ip address
> > ppp multilink
> > ppp multilink group 1
> >
> >
> > interface Virtual-Template1
> > no ip address
> > ppp multilink
> > ppp multilink group 1
> > end
> >
> > interface Multilink1
> > ip address 145.1.0.5 255.255.255.0
> > no cdp enable
> > ppp multilink
> > ppp multilink group 1
> > end
> >
> > Has anyone experienced this before?
> >
> > TIA,
> > Bill
> >
> >
> >
> >
> >
> >
> >
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