Solved

Bridge b/w fasteth and cable subinterfaces ?

Posted on 2004-03-25
10
327 Views
Last Modified: 2010-04-12
Is it possible to setup bridge between fa 0/0.1 and cab 1/0.1 on cisco ubr7114 12.1(11)BC3 realize ?
The goal have to be to extend a vlan (dot1q on fasteth 0/0.1) trough cable modem to the router behind it ?
0
Comment
Question by:brabard
  • 5
  • 5
10 Comments
 
LVL 6

Expert Comment

by:Pascal666
ID: 10697028
0
 
LVL 5

Author Comment

by:brabard
ID: 10701899
So , is your answer "No , it's impossible" ?
Cause I know that all the device can be turned into bridge mode , what I need is fa0/0 , fa0/1 and ca1/0 to work in routing mode , but to create something like a bridge between fa0/0.1 and ca1/0.1 , cause fa0/0 is connected to vlan2 and fa0/0.1 is connected to vlan3 trough a wan switch .
0
 
LVL 6

Expert Comment

by:Pascal666
ID: 10702043
It can be done, if you read the document I linked you to it tells you how.

-Pascal
0
 
LVL 5

Author Comment

by:brabard
ID: 10702475
I know that document , cause the first thing I have done was to make search in www.cisco.com .
But , bridge-group is linked to the pfisical interface , otherwise cab 1/0.1 is a virtual interface , so it's in relation with ip routing .
Where is the problem , I have other dhcp pool for a special modem that have to be linked to fa0/0.1 instead of fa0/0 . I am giving the modem ip address from cab1/0.1's network , so that is the onli thing that related that modem to cab1/0.1 .

That's why I am thinking for "something like bridge" , may be virtual-template , but the problem is that the cable modem's eth interface have to be bridget to another interfase trough fa0/0.1->Switch1->Switch2 ... so on .
0
 
LVL 6

Expert Comment

by:Pascal666
ID: 10707202
I bridge to subinterfaces all the time without any problems.

-Pascal
0
Highfive Gives IT Their Time Back

Highfive is so simple that setting up every meeting room takes just minutes and every employee will be able to start or join a call from any room with ease. Never be called into a meeting just to get it started again. This is how video conferencing should work!

 
LVL 5

Author Comment

by:brabard
ID: 10711278
Did you realy understand what I want ?
0
 
LVL 6

Expert Comment

by:Pascal666
ID: 10716724
For example:

bridge crb
interface FastEthernet0/0.1
       bridge-group 1
       bridge-group 1 spanning-disabled
interface Cable1/0.1
       bridge-group 1
       bridge-group 1 subscriber-loop-control
       bridge-group 1 spanning-disabled

-Pascal
     
0
 
LVL 5

Author Comment

by:brabard
ID: 10721614
Ok , I agree the way to do it , the problem is that in conf int cab1/0.1 I can't add no bridge-group , no encapsulation commands ...
What type of platfor and IOS did you try with this configuration ?
0
 
LVL 6

Accepted Solution

by:
Pascal666 earned 500 total points
ID: 10726815
I have done this on ethernet and serial subinterfaces on multiple platforms and IOSs, but never on a cable subinterface.  Did you enter the "bridge crb" command before trying to enter the "bridge-group 1"?  You may also want to try "bridge irb" instead.  It may be that cable subinterfaces do not support bridging.  There is another feature that may do what you want, but you would have to upgrade your IOS.

http://www.cisco.com/en/US/products/sw/iosswrel/ps5012/prod_release_note09186a0080080bf2.html#wp308513

-Pascal
0
 
LVL 5

Author Comment

by:brabard
ID: 10997743
Hi ,
I am late with clossing the question , but you are right , I discovered many possibilities and documents and found that cable subinterfaces do not support bridge mode in uBR 71.. 72.. series , only between a single cable slot/controler and a fa subinterface on 72.. series .
0

Featured Post

How to run any project with ease

Manage projects of all sizes how you want. Great for personal to-do lists, project milestones, team priorities and launch plans.
- Combine task lists, docs, spreadsheets, and chat in one
- View and edit from mobile/offline
- Cut down on emails

Join & Write a Comment

Suggested Solutions

One of the Top 10  common Cisco VPN problems are not-matching shared keys. This is an easy one to fix, but not always easy to notice, see the case below. A simple IPsec tunnel between fast Ethernet interfaces of routers SW1 (f1/1) and R1(f0/0). …
Overview Often, we set up VPN appliances where the connected clients are on a separate subnet and the company will have alternate internet connections and do not use this particular device as the gateway for certain servers or clients. In this case…
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…

757 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

21 Experts available now in Live!

Get 1:1 Help Now