08-09-2013 08:40 AM - edited 03-07-2019 02:50 PM
Hello all,
I've recently connected a previously unused interface from our F5 LTM to our 3560G switch. I have the LTM interface and switchport interface both in the same VLAN. However when I do a "show mac-address-table int g0/48" the interface doesn't have a MAC address showing. The "show int g0/48" shows the below results. (no errors shown below that either). Basically the overall problem is we have a server connected to the switch with an IP within that Vlan, the server's switchport is also in that Vlan, but I can not ping the server from within a shell command from the LTM, but I ping it from the switch itself. When I run a TCPDump from the LTM I see the following:
[LB1:Active] config # tcpdump -ni VLAN15 -s0 host x.x.78.44
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode listening on VLAN15, link-type EN10MB (Ethernet), capture size 65535 bytes
14:22:50.358148 arp who-has x.x.78.44 tell x.x.78.31 out slot1/tmm0 lis=
14:22:52.358375 arp who-has x.x.78.44 tell x.x.78.31 out slot1/tmm0 lis=
SW1#show int g0/48
GigabitEthernet0/48 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 001b.90e3.d0b0 (bia 001b.90e3.d0b0)
Description: LTM1-p1.6
MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 1000Mb/s, media type is 10/100/1000BaseTX
SW1#show run int g0/48
Building configuration...
Current configuration : 135 bytes
!
interface GigabitEthernet0/48
description LTM1-p1.6
switchport access vlan 15
switchport mode access
spanning-tree portfast
end
**Interface of Server in question
interface GigabitEthernet0/37
description Server NIC2 VLan15
switchport access vlan 15
switchport mode access
spanning-tree portfast
SW2#show int g0/37
GigabitEthernet0/37 is up, line protocol is up (connected)
Hardware is Gigabit Ethernet, address is 001b.8f9f.6725 (bia 001b.8f9f.6725)
Description: Web4 NIC2 Vlan15
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 100Mb/s, media type is 10/100/1000BaseTX
Any thoughts or suggestion on what to check on why commuication from the LTM interface isn't getting out to the server. Again they are on the same VLAN, I can ping the server from the Switch and the firewall with no issues. All the other LTM interfaces are working fine and I see MAC addresses showing up for those interfaces in their corresponding swtich ports.
Thanks,
Bob
08-09-2013 09:53 AM
Hi,
Can you post your config.
Regards
Alain
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08-09-2013 10:35 AM
cadet.. Is there something specfic you'd like to see? I'd be happy to post specfic areas if you can let me know what you might be looking for. The reason I ask is the config is full of senstive information that I'd prefer not to share. Though I can go through and edit it to hide most of that information, it's very time consuming. Again something I can do if necessary.
Thanks,
Bob
08-09-2013 11:28 AM
If you've added VLAN 15 specifically for these two devices, did you add VLAN 15 into the VLAN database?
08-09-2013 11:47 AM
Yes, and I've confirmed it by doing a "show vlan" command. I do see that Vlan 15 exist and that port is assoicated to that vlan.
Thanks
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