Bug ID 621115: IP/IPv6 TTL/hoplimit may not be preserved for host traffic

Last Modified: Nov 07, 2022

Bug Tracker

Affected Product:  See more info
BIG-IP All(all modules)

Known Affected Versions:
12.1.0, 12.1.0 HF1, 12.1.0 HF2, 12.1.1, 12.1.1 HF1, 12.1.1 HF2, 12.1.2

Fixed In:
13.0.0, 12.1.2 HF1

Opened: Oct 06, 2016
Severity: 2-Critical
Related Article:
K01122318

Symptoms

Traffic to and from the Linux host has TTL set to 255 or hop limit set to 64. This may impact any protocols that scrutinize the TTL such as IGMP or BGP.

Impact

IGMP packets will not be passed from TMM to the Linux host and remote routers may reject IGMP packets from the BIG-IP. BGP neighbors may reject packets from the BIG-IP.

Conditions

IP/IPv6 TTL/hoplimit for host traffic.

Workaround

Adjust TTL verification restrictions on peer devices.

Fix Information

The IP/IPv6 TTL/hoplimit of host traffic is no longer modified when it traverses TMM.

Behavior Change