Forum Discussion
NimbostratusF5 mac being learned for my nodes
There are few of my nodes which are down, however I am still able to get the mac address for those device and that mac address is the address for F5 interface.
Issue happens when one of my node which is down comes up on the network.
Can anyone please suggest why this happens and how can I avoid that.
5 Replies
shaggycan you describe how the f5 is a part of this environment? is the f5 the default gateway of those nodes? is the device learning the F5's mac-address in a different network than those nodes?
if i recall correctly, i've enable that functionality in the past when enabling ARP for a network virtual address that i use for a network virtual server
Bhums_186567yes F5 is the default gateway for my servers. The nodes which are down are showing the F5 MAC.
StephanMantheyNacreous
Hi Bhums,
as shaggy already mentioned, a network virtual address may cause the issue. Would you please provide the output of the following command:tmsh list ltm virtual-address one-linePerhaps you accidentially enabled ARP for a network virtual server?
Second reason may be using VLAN groups in opaque mode. In case of a loop I can imagine a symptom like this. Thanks, Stephan- StephanManthey
PS: In case you don´t want to reveal your IPs to the world the output should be anonymized. 🙂
tmsh -q -c "cd /; list ltm virtual-address one-line recursive" | sed -r 's/(\/|address )([0-9]+\.){3}[0-9]+/**anonymized**/g' - StephanManthey
PS2: For whatever reason I cannot edit/delete the previous post.
Here is a more verbose version and small fix:tmsh -q -c "cd /; list ltm virtual-address one-line all-properties recursive" | sed -r 's/(\/|address )([0-9]+\.){3}[0-9]+/\1**anonymized**/g'
