Forum Discussion

Nimbostratus

Aug 10, 2010

VLAN Routing

Having an issue passing traffic from F5 BigIP to internal/external network. Both network's are using tagged VLAN's. I have configured BigIP to use the same VLAN number and assigned a Self IP to the same VLAN subnet. The ICMP monitors show all objects as down. From BigIP command line I am able to ping all self IP's and Virtual Servers, but nothing outside of BigIP. TCPDump shows arp request, but no response. Configuration is as follows;

96.193.25.1 Default Gateway

VLAN 900

96.193.25.21 Virtual Server

96.193.25.17 Self IP

F5 LTM/LC

172.18.7.10 Self IP

VLAN 17

172.18.7.63 Server

Any help would be greatly appreciated. I am sure I am missing something simple.

Thanks

config

design

19 Replies

Chris_Miller
Altostratus
Aug 11, 2010
Posted By Drodneys on 08/11/2010 07:10 AM

Chris that is correct.

Can you run this command from console/ssh and grab the output? bigpipe interface 1.1
Drodneys_24642
Nimbostratus
Aug 11, 2010
Chris found cable issue for interface 1.1. Looks like it is up now;

INTERFACE 1.1

| Speed Pkts Pkts Drop Coll Bits Bits Errs Trunk

| Mbps in out in out

| UP 1000 FD 1.072M 8912 1.056M 0 1.505G 5.035M 0
Chris_Miller
Altostratus
Aug 11, 2010
Posted By Drodneys on 08/11/2010 08:54 AM

Chris found cable issue for interface 1.1. Looks like it is up now;

INTERFACE 1.1

| Speed Pkts Pkts Drop Coll Bits Bits Errs Trunk

| Mbps in out in out

| UP 1000 FD 1.072M 8912 1.056M 0 1.505G 5.035M 0

When you say "up", I'm crossing my fingers that this means you're able to ping the server in the same subnet now? Are you still having other issues?
Drodneys_24642
Nimbostratus
Aug 11, 2010
On vlan 7 I am able to ping the server in the same subnet. On vlan 998 I am not able to ping.
Chris_Miller
Altostratus
Aug 11, 2010
So on vlan 998:

96.193.25.17/255.255.255.0 is your Self-IP and set to vlan 998. You're unable to ping 96.193.25.1 from the BIG-IP?
Drodneys_24642
Nimbostratus
Aug 11, 2010
that is correct
Chris_Miller
Altostratus
Aug 11, 2010
Can you do a "bigpipe interface 1.3" and show the output?
Drodneys_24642
Nimbostratus
Aug 12, 2010
Chris I found the issue(I think you mentioned it earlier but I didnt catch it). VLAN 998 is a tagged interface, but it is not a trunk on the switch side like 1.1. When changed VLAN 998 to untagged all the health monitors went to green. I am able to ping on VLAN 998. Thanks for all your help!
Chris_Miller
Altostratus
Aug 12, 2010
Posted By Drodneys on 08/12/2010 09:48 AM

Chris I found the issue(I think you mentioned it earlier but I didnt catch it). VLAN 998 is a tagged interface, but it is not a trunk on the switch side like 1.1. When changed VLAN 998 to untagged all the health monitors went to green. I am able to ping on VLAN 998. Thanks for all your help!

Gotcha...so from the F5, you were sending a vlan tag but the switch wouldn't get that...makes sense. Glad to hear it's working for you.