cancel
Showing results for 
Search instead for 
Did you mean: 
SamPirok
Community Manager Community Manager
Community Manager

Summary

Switch/routers running the affected SLX-OS versions and configured for DHCP IP Helper will trigger a condition where RX buffer exhaustion is seen with DHCP relay configuration, which will cause a network outage. This issue is applicable only to DHCP Relay agent use case.

Example of DHCP IP Helper configuration: 

interface Ve 10 
ip directed-broadcast 
ip address 10.10.10.1/24 
ip dhcp relay address 10.10.20.1 
ip dhcp relay address 10.10.30.1 

Background

RX buffers were not freed up properly while handling the DHCP broadcast packets at HSLAGT IPHELPER context.
Impact

Loss of packets to the control plane affects protocols resulting in a network outage.

Products Affected

All SLX-OS product platforms

Software Affected

SLX-OS 20.5.3, SLX-OS 20.5.3a, SLX-OS 20.5.3b, SLX-os 20.6.1, SLX-OS 20.6.1a, SLX-OS 20.6.1b, SLX-OS 20.6.2, SLX-OS 20.6.2a Releases

Symptoms

Protocols failing to stay up will be service impacting.

Workaround

Once the switch/router is in this state, the only way to recover is to reload and immediately upgrade to a version that includes a fix to prevent it from reoccurring.

Solution

Upgrade the SLX-OS version to either SLX-OS 20.5.3c, SLX-OS 20.6.1c, SLX-OS 20.6.2b, or SLX-OS 20.6.3 (when it is available).

Contact Extreme GTAC for assistance if needed.

Please see the full Field Notice here for more details and updates. 

GTM-P2G8KFN