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Dual ISP at HQ and Single ISP at
Branch...https://supportforums.cisco.com/people/brogers%40agilit.com
Replies2010/03/08 11:57
Background HQ has dual ISPs (a.b.c.d is fa0/0 and e.f.g.h is dialer1). Branch has
single ISP (i.j.k.l is fa0/0). Both sides are using Cisco 2621 routers.
two GRE tunnels created between the HQ and Branch offices. On the HQ side
Tunnel0 (ip = x.x.x.1/30, source = fa0/0 of the hq router, and destination = fa0/0
of the branch router) - Tunnel1 (ip = x.x.x.5/30, source = dialer1 of the hq
router, and destination = fa0/0 of the branch router). On the Branch side
Tunnel0 (ip = x.x.x.2/30, source = fa0/0 of the branch router, and destination =
fa0/0 of the hq router) - Tunnel1 (ip = x.x.x.6/30, source = fa0/0 of the branch
router, and destination = dailer1 of the hq router).
side the private LAN is 10.10.10.0/24 and for the Branch side the private LAN is
192.168.10.0/24.
0.0.0.0 0.0.0.0 fa0/0 10 192.168.10.0 255.255.255.0 Tunnel0 5 192.168.10.0
255.255.255.0 Tunnel1 10
255.255.255.0 Tunnel0 5 10.10.10.0 255.255.255.0 Tunnel1 10
Result What I would like to do is use dialer1 on the HQ side to be my primary
Internet connection for that office and fa0/0 for the backup Internet connection
for that office. Also, on the HQ side I would like to use Tunnel0 as my primary
link to the branch office and Tunnel1 as my backup link to the branch office. On
the Branch office side I would like to use Tunnel0 as my primary link to the hq
office and Tunnel1 as my backup link to the hq office.
the HQ side dialer1 is both the primary Internet connection for that office (this
is what I want), but Tunnel1 is the primary link to the branch office (not what I
want). On the Branch side Tunnel1 is the primary link to the hq office (not what I
want) Please let me know if you have questions or need additional
information.
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Re: Dual ISP at HQ and Single ISP at...
Did you verify Tunnel 0 is actually up?
both routers along with the output from the route table?
Reply
Re: Dual ISP at HQ and Single ISP
at...https://supportforums.cisco.com/people/brogers%40agilit.com
11:57
Edison, The Tunnel 0 never does come up. It has something to do with the

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