Bug ID 1600333: When using long VLAN names, ECMP routes with multiple nexthop addresses may fail to install

Last Modified: Oct 04, 2024

Affected Product(s):
BIG-IP TMOS(all modules)

Known Affected Versions:
15.1.0, 15.1.0.1, 15.1.0.2, 15.1.0.3, 15.1.0.4, 15.1.0.5, 15.1.1, 15.1.2, 15.1.2.1, 15.1.3, 15.1.3.1, 15.1.4, 15.1.4.1, 15.1.5, 15.1.5.1, 15.1.6, 15.1.6.1, 15.1.7, 15.1.8, 15.1.8.1, 15.1.8.2, 15.1.9, 15.1.9.1, 15.1.10, 15.1.10.2, 15.1.10.3, 15.1.10.4, 15.1.10.5, 16.1.0, 16.1.1, 16.1.2, 16.1.2.1, 16.1.2.2, 16.1.3, 16.1.3.1, 16.1.3.2, 16.1.3.3, 16.1.3.4, 16.1.3.5, 16.1.4, 16.1.4.1, 16.1.4.2, 16.1.4.3, 16.1.5, 16.1.5.1, 17.1.0, 17.1.0.1, 17.1.0.2, 17.1.0.3, 17.1.1, 17.1.1.1, 17.1.1.2, 17.1.1.3, 17.1.1.4

Opened: Jun 24, 2024

Severity: 4-Minor

Symptoms

Route updates are dropped. When enabling nsm debug, you might see message similar to: 2024/06/20 22:49:11 errors: NSM : addattr: buffer too small(missing: 4 bytes) 2024/06/20 22:49:11 errors: NSM : netlink_route: error at tmos_api.c:806

Impact

Tmrouted never sees the NEWROUTE update.

Conditions

-- max-path set to a high value (64) in ZebOS -- Long VLAN names are used

Workaround

- If 'max-paths ibgp 16' of higher is desired, then use smaller VLAN names - If changing VLAN names is not desired, then use a lower value on 'max-paths ibgp X'

Fix Information

None

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips