Bug ID 1505473: Response for TMM originated ICMPv6 requests are dropped when SP-DAG is used

Last Modified: Nov 29, 2025

Affected Product(s):
BIG_IP_NEXT(CNF) CNF(all modules)

Known Affected Versions:
1.2.1

Opened: Feb 08, 2024

Severity: 1-Blocking

Symptoms

Responses for TMM-originated ICMPV6 Packets are dropped.

Impact

There is no functional impact for any of the modules. But the issue affects troubleshooting as it is not possible to check the reachability of hosts / servers in internal VLANs

Conditions

1) CMP Hash in vlan set to SP-DAG (SRC_ADDR for external VLAN's and DST_ADDR for internal VLAN) 2) Routes in debug container for reaching a host in internal VLAN host points to tmm dev interface 3) Initiate ICMPv6 ping from debug container to internal VLAN hosts

Workaround

1) Use default cmp-hash in vlans or 2) Add specific routes to reach the internal VLAN hosts from debug container

Fix Information

None

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips