Help me please

[Damrongsak Saetunk]

http://www.cisco.com/en/US/tech/tk331/tk660/technologies_tech_note09186a0080094471.shtml#intro

with  Example 9: Remote Transparent Bridging With Circuit Group

solution is

- 2 sites ( HQ and Branch ) configure same network (ex 192.168.1.0/24)

- we use 2 different links media providers

- 2 links run active active

my questions

  - an above configuration of cisco on each providers would not dectect looping ?

  - i have 2 router cisco 1841 and i just add 2 wic-4esw to each my router so with this devices and that configuration can i success in this solution ?

  - im not sure that ex.9 they said LAN1 and LAN2 meaning is same network or not ? if not even i can't use 192.168.1.0/24 with 2 sites right ?

If all of this it not work could anyone suggest a solution for me.

Thank you very much and i so sorry with my bad english.

[Vasilii Mikhailovskii]

Hello.

In example 9 LAN1 and LAN2 are using single L3 subnets.

I guess example 9 could work for you if ISPs provided you L2 links and did not block BPDU. I would guess it's not your case.

Anyway, bridging customer network into WAN is not a good design (in terms of security, managebility and support).

The easiest solution for implementation and further support will be:

• change IP-address for branch (let's say 192.168.11.0/24);
• establish dinamic routing between routers;
• use equal cost over 2 links to do load-sharing and automatic failover.

PS: if you insist on using L2, WAN interfaces runs Ethernet and provider do not break LACP, you could try to build etherchannel.

[Damrongsak Saetunk]

Dear  MikhailovskyVV

Thank you very much !