Specifications

Clarifications and Known Behaviors
ExtremeWare 7.1.1 Release Notes 41
802.1w Topology Change Might Cause FDB Flush of Edge Ports
802.1w topology changes might cause the FDB to flush and re-learn edge ports (PD2-161413529).
FDB Not Flushed After Link Failure with RSTP
When using RSTP, the FDB is not flushed when recovering from a link failure. This is the expected
behavior (PD2-143730501).
Do Not Configure All Ports in s0
With all ports on several FM-32 modules in s0 and more than 256,000 FDB entries continuously
learning, deleting a range of ports from a VLAN, adding the same range to another VLAN, deleting
them from that VLAN, then adding them back to the first VLAN can cause a watchdog reboot. Do not
configure all ports in s0 (PD2-118450167).
Error Messages with Topology Changes
If you have STP domains configured on a switch and add active ports to the domain, bringing the links
up and down might generate error messages similar to the following (PD2-159834201):
<Erro:STP.OutBPDU.Drop> Port=4:13: Illegal message age (21)
The “C” Flag Might Be Permanently Set
Occasionally, after an STP topology change, the “C” flag in the output of the show stp command might
be permanently set. To reset the flag, disable and re-enable STP (PD2-159151212).
Mirroring Does Not Mirror STP BPDUs
Mirroring does not mirror STP BPDUs (PD2-156960212).
Topology Change Counter Might Continuously Increment
After an STP topology change, the Number of Topology Changes counter in the output of the show stp
detail
command might continue to increment (PD2-156960201).
Topology Change Affects All Domains that Share Ports
If you configure the same physical ports on different STP domains, a topology change on one of the
domains causes the FDB to flush for all domains sharing those physical ports (PD2-145439733).
Large STPD Configuration Download Might Reboot Switch
If you download a configuration with more than 70 STP domains, and each domain has more than 120
VLANs, the switch might reboot. To avoid this, disable the system watchdog timer, download the
configuration, and enable the timer (PD2-136044092).
A Large STP Configuration with 10 Link Transitions
If you have more than 120 802.1w STPDs with more than 2,000 total VLANs, a link failover might form
a loop. The loop might last as long as 40 seconds, depending on the number of VLANs configured
(PD2-135691018).