From: Mike Kraus \(mikraus\) (mikraus@cisco.com)
Date: Wed Jul 04 2007 - 13:51:57 ART
Right after I sent this, I found this post internal:
"The hardware in 3550 treats IPv6 as a non-IP packet and hence you are
allowed to bridge between two vlans using fallback bridging.
The 3560 hardware understands IPv6 and hence doesn't allow it to be
bridged across vlans (just like IPv4 packets on 3550/3560). You can
still bridge it within the vlan."
So, I guess this also confirms that fallback bridging is IPv4 only on
both the 3550 & 3560 since they both understand IPv4. (By the way, it
doesn't matter what sdm template you use, IPv6 still fails to be bridged
on the 3560).
-----Original Message-----
From: Mike Kraus (mikraus)
Sent: Wednesday, July 04, 2007 11:48 AM
To: 'Antonio Soares'; ccielab@groupstudy.com
Subject: RE: Fallback Bridging for non-IP only?
Interesting, I only have a 3560 (so didn't do this on a 3550), and this
seems to be failing for me. I will look again.
-----Original Message-----
From: Antonio Soares [mailto:amsoares@netcabo.pt]
Sent: Wednesday, July 04, 2007 11:41 AM
To: Mike Kraus (mikraus); ccielab@groupstudy.com
Subject: RE: Fallback Bridging for non-IP only?
Confirmed:
++++++++++++++++++++++++++++++++++++++++
Configs:
++++++++++++++++++++++++++++++++++++++++
R1#
R1#sh runn int e0/0
Building configuration...
Current configuration : 100 bytes
!
interface Ethernet0/0
no ip address
half-duplex
ipv6 address 2001::1/64
ipx network ABCD
end
R1#
++++++++++++++++++++++++++++++++++++++++
R5#sh runn int f0/0
Building configuration...
Current configuration : 116 bytes
!
interface FastEthernet0/0
no ip address
duplex auto
speed auto
ipv6 address 2001::5/64
ipx network ABCD
end
R5#
++++++++++++++++++++++++++++++++++++++++
CAT-3550:
!
interface FastEthernet0/1
switchport access vlan 10
switchport mode access
!
interface FastEthernet0/5
switchport access vlan 50
switchport mode access
!
!
interface Vlan10
no ip address
bridge-group 1
!
interface Vlan50
no ip address
bridge-group 1
!
bridge 1 protocol vlan-bridge
!
++++++++++++++++++++++++++++++++++++++++
Outputs:
++++++++++++++++++++++++++++++++++++++++
R1#ping 2001::5
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 2001::5, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/4 ms
++++++++++++++++++++++++++++++++++++++++
R1#ping ABCD.0011.93e6.91c0
Translating "ABCD.0011.93e6.91c0"
Type escape sequence to abort.
Sending 5, 100-byte IPX Novell Echoes to ABCD.0011.93e6.91c0, timeout is
2
seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms R1#
++++++++++++++++++++++++++++++++++++++++
R5#ping 2001::1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 2001::1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 0/1/4 ms
++++++++++++++++++++++++++++++++++++++++
R5#ping ABCD.000c.3093.2480
Translating "ABCD.000c.3093.2480"
Type escape sequence to abort.
Sending 5, 100-byte IPX Novell Echoes to ABCD.000c.3093.2480, timeout is
2
seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms R5#
++++++++++++++++++++++++++++++++++++++++
-----Original Message-----
From: Antonio Soares [mailto:amsoares@netcabo.pt]
Sent: quarta-feira, 4 de Julho de 2007 17:31
To: 'Mike Kraus (mikraus)'; 'ccielab@groupstudy.com'
Subject: RE: Fallback Bridging for non-IP only?
I think you can bridge IPv6 in the 3550.
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Mike Kraus (mikraus)
Sent: quarta-feira, 4 de Julho de 2007 16:43
To: ccielab@groupstudy.com
Subject: RE: Fallback Bridging for non-IP only?
One additional note on the below, IPv6 doesn't get bridged either (but
IPX does).
________________________________
From: Mike Kraus (mikraus)
Sent: Wednesday, July 04, 2007 10:35 AM
To: ccielab@groupstudy.com
Subject: Fallback Bridging for non-IP only?
It appears that fallback bridging on the 3550/3560 is for non-IP traffic
only. Is this correct?
Simple config:
no ip routing
bridge irb
bridge 1 protocol vlan-bridge
no bridge 1 route ip
bridge 1 bridge ip
int vlan 2
bridge-group 1
int vlan 3
bridge-group 1
IP hosts configured in the same subnet on VLAN 2 & VLAN 3 or router
ports assigned to bridge-group 1 still can't talk to each other. IPX
works fine!
(I tried CRB as well, same result). It seems like all the documentation
states that this is really for bridging of non-IP traffic only, so I can
only assume that this is the case...
Thanks,
Mike
This archive was generated by hypermail 2.1.4 : Sat Aug 18 2007 - 08:17:39 ART