Common Symptoms
Alteon does not have IPV6 dynamic routing information available at the SP. Therefore, the server responses which use dynamic routes are sent to the MP. This can lead to high MP CPU usage.
Affected Versions
The following versions and all prior Alteon releases:
- 33.5.14.0
- 34.0.10.0
- 34.5.5.0
How to Identify
Monitor the MP CPU usage, and check the syslog messages for any indication of high CPU messages.
CRIT system: The MP CPU Utilization has reached above 80%
with /cfg/slb/adv/eventc enabled.
You will also see the event counter incremented at a high rate:
SP: IPv6 FWD - IPv6 pkt has no ip fdbi - resolve in MP (ip6_forwar [90521929][ 68003, 89928, 217446, 33335, 295035]
Feature ID
AL-151765
Solution
Upgrade to the relevant versions with the fix.
Workaround
Add a static route to reach the IPv6 clients/client networks.
For stateful protocols enable "return to source mac"
ETA for fix
Versions above:
- 3.5.15.0
- 34.0.11.0
- 34.5.6.0