A few ISP is trying to sell us ethernet service between two offices..
100 Mbps for around 6k a month. Much cheaper than a DS3 but heres my
question..

Say I got Site A - 10 Mbps F/DS3, Site B - 10Mbps F/DS3

Site A ---- LAN ---- Site B

If DS3(internet) goes down on site A, do you guys think its possible
to redirect traffic out of the DS3(internet) in Site B ?

Also can you even run HSRP from a router in Site A bind to a Site B
router ?
as I understand it, HSRP is for LAN/subnet and wasn't sure if this is
even possible..

In article <d9df793.0407201004.5d5eac51@posting.google.com>,
forcesho@cyforce.net (Jeff Mac Pherson) wrote:

> A few ISP is trying to sell us ethernet service between two offices..
> 100 Mbps for around 6k a month. Much cheaper than a DS3 but heres my
> question..
>
> Say I got Site A - 10 Mbps F/DS3, Site B - 10Mbps F/DS3
>
> Site A ---- LAN ---- Site B
>
> If DS3(internet) goes down on site A, do you guys think its possible
> to redirect traffic out of the DS3(internet) in Site B ?
>
> Also can you even run HSRP from a router in Site A bind to a Site B
> router ?
> as I understand it, HSRP is for LAN/subnet and wasn't sure if this is
> even possible..

You can achieve your goal, but I think you'll need to use a routing
protocol. HSRP is useful for failover between different default
gateways on the *same* LAN, but you need to switch from one interface
(the DS3) to a different one (the inter-office LAN).

--
Barry Margolin, barmar@alum.mit.edu
Arlington, MA
*** PLEASE post questions in newsgroups, not directly to me ***

HSRP packet use the all routers multicast IP address (224.0.0.2) as
the destination IP address. So as long as this multicast traffic is
permitted across the suggested link then the two HSRP peers should
"see" each other.

If you do this, strongly suggest you also implemnt HSARP
authentication - see
http://www.cisco.com/univercd/cc/td/doc/product/lan/c3550/12113ea1/3550scg/swhsrp.htm#1044417

for details