what i would suggest is to configure your T1s for FR [even if they are
regular leased lines, just turn off keepalives, or configure one side as
a FR DCE interface]. that way you can configure separate p2p
subinterfaces. you can then associate each ethernet with 1 sub-int, and
use a unique bridge group for them. if you add additional T1's,
sub-interface them as well. place them in the appropriate bridge groups,
and enable bridge-circuit groups to load balance between the T1s.
regards
.siva
On Sat, 3 Jun 2000 jlewis@lewis.org wrote:
> I have a client who'll be moving from one building to another over the
> course of several months. They have multiple separate ethernet networks
> in the current building and would like to have up to 4 of them bridged to
> the new building so systems/workstations can be moved one at a time
> without having to reconfigure/renumber anything.
>
> Am I correct in assuming this can be done with a pair of 3640's each with
> a pair of NM2e2w and 4 WIC-1T1DSU's? Going by the example at
> http://www.cisco.com/warp/public/701/37.html, it looks like I can just
> setup 4 bridge groups and assign an ethernet and serial interface to each
> one. I'm guessing I could also enable irb and setup one or more BVI
> interfaces on each router for management access over ethernet.
>
> Now for the tricky question. All the examples I've seen of briding over
> WAN interfaces have a 1:1 mapping of bridge groups to WAN interfaces...or
> in one case, multiple WAN interfaces for load sharing associated with a
> single bridge group. Is there any way to bridge multiple ethernets over a
> single WAN link (or even better, over 1 or more load sharing WAN links)?
>
> i.e.
>
> 10.0.0.0/24--e0--|------| |------|--e0--10.0.0.0/24
> | | one or more | |
> 10.0.1.0/24--e1--| 3640 |==============| 3640 |--e1--10.0.1.0/24
> | | T1's | |
> 10.0.2.0/24--e3--|------| |------|--e3--10.0.2.0/24
>
> ----------------------------------------------------------------------
> Jon Lewis *jlewis@lewis.org*| I route
> System Administrator | therefore you are
> Atlantic Net |
> _________ http://www.lewis.org/~jlewis/pgp for PGP public key_________
>
>
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