From: Huan Pham (Huan.Pham@peopletelecom.com.au)
Date: Thu Sep 04 2008 - 04:03:06 ART
Joseph,
From my intepretation from the topology, R3 does not share the LAN
connection with R1 & R2. Your solution does not work if both R1 & R2
loose connectivity to BB. This is because R1 has a higher priority than
R2. If both R1& r2 loose connections to BB1 & BB2, R1 will be the active
router. Users traffic defaulted to R1 will get nowhere.
- We need to have R2 priority higher than R1, or
- Run a dynamic routing protocol or additional floating default static
route on R1 to forward traffic toward R2, incase R1 lost connection to
BB1.
Cheers,
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Joseph Brunner
Sent: Thursday, 4 September 2008 3:52 PM
To: 'Shine Joseph'; 'Cisco certification'
Subject: RE: Backup Solution
You can simply use the standby track where a tracked interface is
checked by hsrp... i.e.
R1/R2
R1
Int f0/0
Standby 1 ip 1.1.1.10
Standby 1 track int s0/0 20
Standby 1 priority 110
ip route 0.0.0.0 0.0.0.0 <to bb1>
R2
Int f0/0
Standby 1 ip 1.1.1.10
ip route 0.0.0.0 0.0.0.0 <to bb2>
(some static route to router 3)
ip route 0.0.0.0 0.0.0.0 3.3.3.3 254
R3
Optionally, if R3 has l2 adjacency to the users; the allow r3 to be a
3rd hsrp listener
int r3
standby 1 ip 1.1.1.10
standby 1 priority 50
in a real world setting I often weight standby priorities to tracked
objects; such as routes, and interface line-protocols, etc.
i.e.
standby 1 track 1 20
track 1 ip route 0.0.0.0/0 reachability
-Joe
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Shine Joseph
Sent: Thursday, September 04, 2008 1:21 AM
To: 'Cisco certification'
Subject: Backup Solution
Hi Folks,
I am running a test lab as follows:
R1------------BB1
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R2------------BB2
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R3
R1 is connected to BB1
R1 is connected R2
R2 is connected to BB2
R2 is connected R3
R1 and R2 is running HSRP. If R1 loses the link to BB1 or R2 loses the
link to BB2 the other router servers the users. If R1 loses BB1 and R2
loses BB2,
R2 must route traffic through R3. I am wondering what would be the best
solution for this.
Any pointers are welcome.
Regards,
Shine
Blogs and organic groups at http://www.ccie.net
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