Re: Bridging fails between E1 and FastEthernet

Hey Rick,

I dont see any bride on R2 (between the E1 links).

On R2, enable IRB, route IP, enable protocol ieee, create a BVI, add
serial interface to bridge group and move the IP from serial to BVI.
This shud fix it.

Swap
#19804

On Wed, Jan 12, 2011 at 12:35 PM, Rick Mur <rmur_at_ipexpert.com> wrote:
> Group,
>
> I ran into the following issue and maybe I'm missing something, or I'm
> running into something that's simply not possible. I'm trying to bridge an
> E1 to Ethernet, but for some reason it doesn't work.
>
> Topology:
> SW2-Gig1/0/3--------Fa0/1--R3--S0/0:0-----------S0/2/0:0--R2
> SW1-Gig1/0/3--------Fa0/0--^
>
> Config SW1:
> interface GigabitEthernet1/0/3
> no switchport
> ip address 1.1.100.11 255.255.255.0
>
> Config SW2:
> interface GigabitEthernet1/0/3
> no switchport
> ip address 1.1.100.10 255.255.255.0
>
> Config R2:
> controller E1 0/2/0
> channel-group 0 timeslots 1-31
> !
> interface Serial0/2/0:0
> ip address 1.1.100.2 255.255.255.0
>
> Config R3:
> bridge irb
> !
> controller E1 0/0
> channel-group 0 timeslots 1-31
> !
> interface FastEthernet0/0
> no ip address
> duplex auto
> speed auto
> bridge-group 1
> !
> interface Serial0/0:0
> no ip address
> bridge-group 1
> !
> interface FastEthernet0/1
> no ip address
> duplex auto
> speed auto
> bridge-group 1
> !
> interface BVI1
> ip address 1.1.100.3 255.255.255.0
> !
> bridge 1 protocol ieee
> bridge 1 route ip
>
> Outputs:
>
> SW1 can ping SW2 over R3, so Ethernet to ethernet bridging works:
> SW1(config)#do ping 1.1.100.10
>
> Type escape sequence to abort.
> Sending 5, 100-byte ICMP Echos to 1.1.100.10, timeout is 2 seconds:
> !!!!!
> Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/9 ms
> SW1(config)#
>
> The BVI works fine, as R3 can ping both SW1 and SW2, except R2. R2 can't
> ping any of the addresses.
>
> R3#ping 1.1.100.10
>
> Type escape sequence to abort.
> Sending 5, 100-byte ICMP Echos to 1.1.100.10, timeout is 2 seconds:
> !!!!!
> Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/4 ms
> R3# ping 1.1.100.11
>
> Type escape sequence to abort.
> Sending 5, 100-byte ICMP Echos to 1.1.100.11, timeout is 2 seconds:
> !!!!!
> Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms
> R3#ping 1.1.100.2
>
> Type escape sequence to abort.
> Sending 5, 100-byte ICMP Echos to 1.1.100.2, timeout is 2 seconds:
> .....
> Success rate is 0 percent (0/5)
> R3#sh bridge 1 verbo
>
> Total of 300 station blocks, 298 free
> Codes: P - permanent, S - self
>
> BG Hash Address Action Interface VC Age RX count TX
> count
> 1 2B/0 0026.52cd.6f44 forward FastEthernet0/0 - 0 6
> 0
> 1 37/0 001c.b1c6.7047 forward FastEthernet0/1 - 0 16
> 10
>
> Flood ports (BG 1) RX count TX count
> FastEthernet0/0 8 8
> Serial0/0:0 0 14
> FastEthernet0/1 8 8
>
> R3#sh span sum
> Root bridge for: Bridge group 1.
> PortFast BPDU Guard is disabled
>
> Name Blocking Listening Learning Forwarding STP Active
> -------------------- -------- --------- -------- ---------- ----------
> Bridge group 1 0 0 0 3 3
> -------------------- -------- --------- -------- ---------- ----------
> 1 Bridge Group 0 0 0 3 3
> R3#
>
>
> I'm in the dark what it could be why this isn't working. I've seen this
> configuration working numerous times on other serial interfaces, but never
> tried it on an E1 before.
>
> Many thanks for your ideas!
>
> --
>
> Regards,
>
> Rick Mur
> Triple CCIE #21946 (Routing & Switching / Service Provider / Storage)
> Sr. Support Engineer IPexpert, Inc.
> URL: http://www.IPexpert.com
>
>
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Received on Wed Jan 12 2011 - 14:16:20 ART