Re: Bridging fails between E1 and FastEthernet

R2 shouldn't bridge. R3 is the bridge between R2 and SW1 and SW2.

--
Regards,
Rick Mur
CCIE3 #21946 (Routing & Switching / Service Provider / Storage)
Sr. Support Engineer  IPexpert, Inc.
URL: http://www.IPexpert.com
On Wed, Jan 12, 2011 at 11:16 AM, swap m <ccie19804_at_gmail.com> wrote:
> 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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> >
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