[c-nsp] Bridging Ethernet VLANs over T1

[Fred Reimer]

By using the same bridge group number for both VLANs would you not be
merging the two VLANs into one bridge group?  That's not what you want, is
it?  You may want to use a separate bridge group number for the two VLANs,
like the example in the document you quoted.

bridge 1 protocol ieee
bridge 2 protocol ieee
!
interface ethernet 0
 vlan-range dot1q 1 600
  bridge-group 1
 vlan-range dot1q 800 4000
  bridge-group 2
!
interface serial 0
 encapsulation ppp
 bridge-group 1
!
interface serial 1
 encapsulation ppp
 bridge-group 2

Two bridge groups, two serial interfaces, for two separate VLANs.

Fred Reimer, CISSP, CCNP, CQS-VPN, CQS-ISS
Senior Network Engineer
Coleman Technologies, Inc.
954-298-1697


> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net [mailto:cisco-nsp-
> bounces at puck.nether.net] On Behalf Of Gary T. Giesen
> Sent: Friday, May 30, 2008 12:11 PM
> To: cisco-nsp at puck.nether.net
> Subject: Re: [c-nsp] Bridging Ethernet VLANs over T1
> 
> Jay,
> 
> Thanks for the reply. Unfortunately that doesn't seem to work, I
> assume because there's no way to specify which VLAN that IP actually
> resides on. Normally bridge-groups/BVI's are only used to bridge one
> VLAN, but in this case it's bridging multiple VLANs.
> 
> GG
> 
> On Fri, May 30, 2008 at 12:05 PM, Jay Hennigan <jay at west.net> wrote:
> > Gary T. Giesen wrote:
> >>
> >> Hi all,
> >>
> >> I have an application that requires us to bridge Ethernet VLANs over
> a
> >> T1. I've previously done this using Nortel/Tasman boxes, and have
> got
> >> it working with a Cisco 1841 w/T1 WIC (per
> >>
> >>
> http://www.cisco.com/en/US/docs/ios/12_3t/12_3t2/feature/guide/gt_bcp.h
> tml),
> >> but I'm having one issue. The Tasman/Nortel boxes allow me to inject
> >> an IP address into one of the VLANs for management purposes, whereas
> I
> >> can't for the life of me figure out how to do it in Cisco-land.
> >>
> >> Cisco config snippet:
> >>
> >> bridge 1 protocol ieee
> >>
> >> interface FastEthernet0/0
> >>  no ip address
> >>  duplex auto
> >>  speed auto
> >>  vlan-id dot1q 10
> >>  description Data VLAN
> >>  bridge-group 1
> >>  exit-vlan-config
> >>  !
> >>  vlan-id dot1q 20
> >>  description Management VLAN
> >>  bridge-group 1
> >>  exit-vlan-config
> >>  !
> >> !
> >>
> >> interface Serial0/1/0
> >>  no ip address
> >>  encapsulation ppp
> >>  service-module t1 clock source internal
> >>  bridge-group 1
> >
> > bridge irb
> >
> > bridge 1 proto ieee
> > bridge 1 route ip
> >
> > int bvi1
> >  ip address 10.10.10.11 255.255.255.0
> >
> >
> >
> > --
> > Jay Hennigan - CCIE #7880 - Network Engineering - jay at impulse.net
> > Impulse Internet Service  -  http://www.impulse.net/
> > Your local telephone and internet company - 805 884-6323 - WB6RDV
> >
> >
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