Last Modified: Apr 28, 2025
Affected Product(s):
BIG-IP TMOS
Fixed In:
11.6.0
Opened: Nov 13, 2013 Severity: 2-Critical
In 11.5.3 you could modify a static ARP entry with the following syntax: tmsh modify net arp /Common/fake1 ip-address 11.22.33.44 mac-address 00:01:d7:a7:ce:c4 In 11.6.0 the same syntax will result in an error: (tmos)# modify net arp /Common/fake2 {ip-address 33.44.55.66 mac-address 00:50:56:86:6d:c2} Syntax Error: "ip-address" may not be specified in the context of the "modify" command. "ip-address" may be specified using the following commands: create, list, show
tmsh command now fails when attempting to modify existing static arp in 11.6.0 and beyond. Non-f5 devices within Hyper-v NVGRE will loose external connectivity with IP address migrates to a new VM. The cause is the failed ARP update cause by the failed tmsh command, via REST.
Upgrading to 11.6.0 or beyond and using this command
Leave out the ip-address parameter: tmsh modify net arp /Common/fake2 {mac-address 00:50:56:86:6d:c3}
Fix route-domain reset/modification on node/virtual-address/snat-translation-address modification
The ip-address attribute for arp / ndp entries can no longer be modified (i.e. tmsh modify net arp <entry> ip-address <value> is invalid).