From: Connie Nie (CNie@EPLUS.com)
Date: Sat Apr 19 2003 - 14:09:10 GMT-3
Hi, there. Here is the scenario I have:
Cat
3550
Router 5 (vlan 50. e0: 150.50.50.5/24) ---------------------Fa 0/5
Router 6 (vlan 60. e0: 150.50.60.6/24)----------------------Fa 0/6
Router 7 (vlan 50. e0.1 150.50.50.7
E0.2 150.50.60.7)-------------------------Fa 0/7
On Cat 3550, I have interface vlan 50: 150.50.50.35/24
Interface vlan 60: 150.50.60.35/24
Everything works----until I put bridge-group 1 onto Router 5's e0 interface.
I can not ping from Cat3550 to R5's e0 interface any more, but I can still
ping between R7's e0.1 and Cat3550's vlan 50 interface. Here is the debug
arp output on 3550 while I am trying to ping 150.50.50.5:
00:18:39: IP ARP throttled out the ARP Request for 150.50.50.5
00:18:40: IP ARP: sent req src 150.50.50.35 0009.b738.9180,
dst 150.50.50.5 0000.0000.0000 Vlan50
00:18:41: IP ARP throttled out the ARP Request for 150.50.50.5.
00:18:42: IP ARP: sent req src 150.50.50.35 0009.b738.9180,
dst 150.50.50.5 0000.0000.0000 Vlan50
00:18:42: datagramsize=100, IP 83: s=150.50.50.35 (local), d=150.50.50.5
(Vlan50), totlen 100, fragment 0, fo 0, encapsulation failed
00:18:42: datagramsize=100, IP 84: s=150.50.50.35 (local), d=150.50.50.5
(Vlan50), totlen 100, fragment 0, fo 0, sending
00:18:42: IP ARP throttled out the ARP Request for 150.50.50.5
00:18:43: IP ARP throttled out the ARP Request for 150.50.50.5.
show arp immediately after
Protocol Address Age (min) Hardware Addr Type Interface
Internet 150.50.50.5 0 Incomplete ARPA
Internet 150.50.60.6 1 00e0.1ef2.9501 ARPA Vlan60
Internet 150.50.50.35 - 0009.b738.9180 ARPA Vlan50
Internet 150.50.60.35 - 0009.b738.9180 ARPA Vlan60
It looks like 3550 is trying to arp for 150.50.50.5 but does not receive an
reply, therefore the encapsulation failure and the incomplete arp entry.
Take bridge-group command off R5's e0 interface, clear arp on 3550,
everything works again. But why? I did not enable irb on R5. The only other
command I used on r5 is bridge 1 protocol ieee.
Another piece of information: if I put bridge-group 1 command on both r5 and
r6, I can only ping one of the e0's interfaces, but not both. If could be R5
one time, and then after reboot, it could chang to R6.
I have been fighting with this all evening. Help!!!! Any thoughts would be
appreciated.
Thank you.
Connie
This archive was generated by hypermail 2.1.4 : Thu May 01 2003 - 13:35:58 GMT-3