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dragonflymr's avatar
dragonflymr
Icon for Cirrostratus rankCirrostratus
Oct 19, 2015

LTM VE and VLAN with several Interfaces

Hi,

 

Just tried to add more than one untagged Interface on LTM VE 11.5.3HF2. For all docs I checked it should be possible, however I am getting such errror:

 

01070734:3: Configuration error: vmw-compat: vlan may only have one interface

 

So is that only related to VE or this version of TMOS or there is no way to add more than one utagged interface to single VLAN?

 

Piotr

 

application delivery
availability
deployment
LTM
performance
TMOS

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    • dragonflymr's avatar
      dragonflymr
      Icon for Cirrostratus rankCirrostratus
      Oct 19, 2015
      Hi, Thanks, I already checked this SOL - looked as not related because trunk was referenced. I can understand (more or less) why it's not very smart to place two interfaces in one VLAN but it should be possible - all docs seems to be saying that. In https://support.f5.com/kb/en-us/products/big-ip_ltm/manuals/product/tmos_management_guide_10_1/tmos_vlans.html) there is: "You can associate physical interfaces on the BIG-IP system directly with VLANs. In this way, you can associate multiple interfaces with a single VLAN, or you can associate a single interface with multiple VLANs." So is above outdated or it's just not possible to do that on VE? Consider setup when there are two separate switches behind LTM (no LAG/Etherchannel or other redundancy). Each switch is connected to one port on LTM and one port on target server (and there are two separate target servers, each connected to separate switch). So one server is receiving packets via switch 1/LTM port 1.1, second server via switch2 LTM port 1.2. I guess no loops here? Then I need to place those two LTM interfaces in the same VLAN - possible on BIG-IP device? If not what solution can be used for such LAN setup? It's customer LAN and current Cisco CSS is connected like that. I have no way to change LAN config and have to migrate CSS to BIG-IP. Piotr
    • dragonflymr's avatar
      dragonflymr
      Icon for Cirrostratus rankCirrostratus
      Oct 19, 2015
      Hi, Thanks, I already checked this SOL - looked as not related because trunk was referenced. I can understand (more or less) why it's not very smart to place two interfaces in one VLAN but it should be possible - all docs seems to be saying that. In https://support.f5.com/kb/en-us/products/big-ip_ltm/manuals/product/tmos_management_guide_10_1/tmos_vlans.html) there is: "You can associate physical interfaces on the BIG-IP system directly with VLANs. In this way, you can associate multiple interfaces with a single VLAN, or you can associate a single interface with multiple VLANs." So is above outdated or it's just not possible to do that on VE? Consider setup when there are two separate switches behind LTM (no LAG/Etherchannel or other redundancy). Each switch is connected to one port on LTM and one port on target server (and there are two separate target servers, each connected to separate switch). So one server is receiving packets via switch 1/LTM port 1.1, second server via switch2 LTM port 1.2. I guess no loops here? Then I need to place those two LTM interfaces in the same VLAN - possible on BIG-IP device? If not what solution can be used for such LAN setup? It's customer LAN and current Cisco CSS is connected like that. I have no way to change LAN config and have to migrate CSS to BIG-IP. Piotr
  • dragonflymr's avatar
    dragonflymr
    Icon for Cirrostratus rankCirrostratus
    Oct 20, 2015

    Hi,

     

    Answering my own question :-)

     

    There is no error when adding more than one untagged Interface to VLAN on physical device. So error on VE is either bug or limitation of VE version.

     

    Piotr