Issues and Workarounds

The following are known open issues with this branch of the software.

The Symptom statement describes what a user might experience if this is seen on the network. The Scenario statement provides additional environment details and trigger summaries. When available, the Workaround statement provides a workaround to the issue.

Table 1: Known Issues

Version

Bug ID

Software

Description

Category

16.10.0023

256631

KB

Symptom/Scenario: Client connected to a particular port will not be able to tunnel any traffic although it will appear to be in tunnel established state from the show commands.

Workaround: Disable or Enable UBT client port or tunneled-node globally (no tunneled-node-server enable/tunneled-node-server enable).

Tunneled Node

16.10.0022

256681

KB

Symptom: Loop protect does not block the PBT enabled port in tunnel established/establishing state.

Scenario: This issue occurred when the loop protect was enabled or configured for a PBT-enabled port in the tunnel-established state.

Workaround: Disable or enable PBT for the affected ports.

NOTE: When using PBT, it is recommended to use STP instead of loop protect. If inevitable, loop protect must be enabled first and then the PBT on the port.

Tunneled node

16.10.0022

256681

KB

Symptom: A PBT tunnel is formed for an MSTP-blocked port.

Scenario: This issue occurred when a PBT-enabled port was in a forwarding state for even one MSTP instance.

Workaround: Configure a single instance STP.

Tunneled node

16.10.0016

255646

KB

Symptom: The show statistics aclv4 <ACL-NAME-STR> vlan <VLAN-ID> out command displays lesser HitCounts for ACL for deny rule.

Scenario: The routed traffic is denied even before the egress Access control list (ACL) when the ACL contains a deny rule, and it is applied in the VLAN egress direction.

ACL

16.08.009

247648

KB

Symptom: The switch fails to bypass authentication for random devices.

Scenario: When the CDP/LLDP bypass is enabled on a switch configured in VSF, the switch fails to bypass authentication for random devices after a redundancy switchover event.

Workaround: Disable and re-enable the affected port to re-enforce CDP/LLDP bypass on the port.

CDP/LLDP Bypass