From: Omer Ansari (omer@ansari.com)
Date: Thu Sep 19 2002 - 07:38:08 GMT-3
OK here goes:
replace R2 and R3 with R6 and R5:
R6's e0: 137.20.64.6
R5's e0ip: 137.20.64.5
R6#sir con | inc Ether
C 137.20.64.0/20 is directly connected, Ethernet0/0
taking an example of a route learnt from R5:
R6#sir ospf | inc 200
O IA 200.200.200.0/24 [110/792] via 137.20.64.5, 00:01:10, Ethernet0/0
R6(config)#int tu55
R6(config-if)#tunn
*Mar 2 09:58:58.489: %LINEPROTO-5-UPDOWN: Line protocol on Interface
Tunnel55, changed state to down
R6(config-if)#tunnel dest 200.200.200.1
R6(config-if)#tunnel source 137.20.64.6
R6(config-if)#
*Mar 2 10:00:06.493: %LINEPROTO-5-UPDOWN: Line protocol on Interface
Tunnel55, changed state to up
R6(config-if)#backup interface bri0/0
thus on R6:
BRI0/0 137.20.224.6 YES manual standby mode
down
..
Tunnel55 unassigned YES unset up up
now lets shut down R5's e0 interface:
R5(config)#int e0/0
R5(config-if)#shut
on R6:
R6#
*Mar 2 10:06:35.502: %OSPF-5-ADJCHG: Process 10, Nbr 137.20.5.5 on
Ethernet0/0 from FULL to DOWN, Neighbor Down: Dead timer expired
R6#
b/c of which the 200.200.100/24 route is lost, because of which the tunnel
goes down:
R6#
*Mar 2 10:06:58.544: %LINEPROTO-5-UPDOWN: Line protocol on Interface
Tunnel55, changed state to down
because of which backup interface kicks up:
*Mar 2 10:06:58.548: %LINK-3-UPDOWN: Interface BRI0/0:1, changed state to
down
*Mar 2 10:06:58.552: %LINK-3-UPDOWN: Interface BRI0/0:2, changed state to
down
*Mar 2 10:06:58.600: %LINK-3-UPDOWN: Interface BRI0/0, changed state to
up
Omer
On Wed, 18 Sep 2002, Peng Zheng wrote:
> COuld you please give me a example?
>
> --- Omer Ansari <omer@ansari.com> wrote:
> > Peng,
> >
> > allow me correct myself. the tunnel would have a
> > destination pointing to a
> > route learnt via R3, not on the e0 address on R3.
> > [perhaps you could
> > monitor the R1-R3 network]
> >
> > when the route vanishes from r2's routing table, the
> > tunnel would go down.
> >
> > the speed with which this would happen will be
> > directly proportional to
> > the convergence speed of the RP in question.
> >
> > Omer
> >
> > On Wed, 18 Sep 2002, Omer Ansari wrote:
> >
> > > Create a tunnel interface on R2 with R3's e0 ip
> > address as destination
> > > (and r2's e0 as source)
> > >
> > > then run backup interface br0/0 on the tunnel If.
> > >
> > > the tunnel would go down when R3's e0 would go
> > down, triggering your
> > > backup interface.
> > >
> > > a wizard called Carlos Mendioroz came up with this
> > some time ago so i
> > > cannot take the accolade.
> > >
> > > Omer
> > >
> > > On Wed, 18 Sep 2002, Peng Zheng wrote:
> > >
> > > > Actually, they are connected through switch.
> > Then,
> > > > what's the solution?
> > > >
> > > > --- Prakash H Somani <pdsccie@rediffmail.com>
> > wrote:
> > > > > Hi,
> > > > >
> > > > > I think I can agree with you partially. R2
> > will dial
> > > > > i.e BRI will
> > > > > come in spoofing mode from standby if R3 e0
> > goes
> > > > > down only if
> > > > > those two routers are directly connected. If
> > those
> > > > > are connected
> > > > > through switch...then it will not work....
> > > > >
> > > > > Regards....Prakash
> > > > >
> > > > > On Wed, 18 Sep 2002 Peng Zheng wrote :
> > > > > >Hi,
> > > > > >
> > > > > >R1(bri 0)-----(bri 0)R2(e0)---(e0)R3
> > > > > > (e1)|________________________|(e1)
> > > > > >
> > > > > >IGRP is run on all three routers.
> > > > > >
> > > > > >Requirement:
> > > > > >
> > > > > >1) R2 only dials R1 when the e0 to R3 is
> > > > > disconnected.
> > > > > >2) Snapshot and dialer watch can not be used.
> > > > > >
> > > > > >
> > > > > >I think I should use backup interface under
> > e0 of
> > > > > R2.
> > > > > >
> > > > > >Is it right?
> > > > > >
> > > > > >If so, How should I configure the
> > dialer-list?
> > > > > >
> > > > > >And because two numbers are used. R2 need to
> > dial
> > > > > >second if it can not connect to R1.
> > > > > >
> > > > > >if:
> > > > > >
> > > > > >dialer map ip 1.1.1.1 name r1 broadcast
> > number1
> > > > > >dialer map ip 1.1.1.1 name r1 broadcast
> > number2
> > > > > >
> > > > > >is OK?
> > > > > >
> > > > > >
> > > > > >Thank you for help.
> > > > > >
> > > > > >Best Wishes,
> > > > > >Peng Zheng
> > > > > >
> > > > > >
> > > > > >
> > > > >
> > >__________________________________________________
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>
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This archive was generated by hypermail 2.1.4 : Mon Oct 07 2002 - 07:43:57 GMT-3