Mar 27, 2026 - For details about updated CVE-2025-53521 (BIG-IP APM vulnerability), refer to K000156741.

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Thomas_Stein_11's avatar
Thomas_Stein_11
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Nov 09, 2015

default / static routes on f5 virtual edition

Hello. I have just deployed a F5 virtual edition in my kvm setup. My kvm network setup is routed. Installation went fine. I can reach the managenment webinterface. I also configured a self ip. My p...
application delivery
deployment
devops
LTM
virtualization
Thomas_Stein_11's avatar
Thomas_Stein_11
Icon for Nimbostratus rankNimbostratus
Nov 09, 2015

Hello Hannes.

Well thats what i tried, but:

[root@bigip:Active:Standalone] ~ tmsh create net route default network 0.0.0.0/0 gw 191.255.255.1 01070330:3: Static route gateway 191.255.255.1 is not directly connected via an interface. [root@bigip:Active:Standalone] ~

The F5 virtual has no ip in that network (191.255.255.1). Thats why i have to do a:

ip r add 191.255.255.1 dev eth0 
ip r add default via 191.255.255.1

But thats not reboot safe obviousely. I put those two commands in /config/startup but that only works now and then. Any ideas?

thanks t.

  • Hannes_Rapp's avatar
    Hannes_Rapp
    Icon for Nimbostratus rankNimbostratus
    Nov 09, 2015
    Perhaps an exit interface method will work? Map the route to an external VLAN which in turn is mapped to your external interface in the network config. Apart from the example below, I dont think there are any good alternative methods. "tmsh create net route default network 0.0.0.0/0 interface VLAN_OUT"
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