Specifications

Clarifications and Known Behaviors
ExtremeWare 7.3.1b3 Release Notes 77
Round Robin Load Sharing
If a port in a round robin load share group is removed, the traffic that was being transmitted on that
link will be distributed on only 1 of the other active load share links in the round robin group. The
traffic is not distributed evenly between the remaining ports (6977).
Port Based Load Sharing on Summit7i
Port-based load sharing on the Summit7i requires ingress ports to be on the same side of the switch
(ports 1 - 4, 9 - 12, 17 - 20, and 25 - 28 on the left, ports 5 - 8, 13 - 16, and 21 - 24 on the right) as the 8
ports in the load share group for all ports in the load share group to transmit/receive traffic (6975).
Alpine and Cross Module Load Sharing
The I/O module configured to contain the “master” port must be physically present in a cross-module
load sharing group for the system to pass traffic (8589, PD2-119098401).
Load Sharing and Specific Ports in a Load Share Group
Due to the load sharing algorithm used for round robin load sharing, when using 3, 5, 6 or 7 ports in a
load share group packet loss will be observed when sending wire-speed traffic across the load share
group. This occurs because some ports will be selected to transmit more packets than other ports
resulting in bandwidth over-subscription and subsequent packet loss. This only occurs with round-robin
load sharing configurations (10311).
Disabling Load Sharing if the Master is Down Generates Error
If the load sharing master link goes down, and you disable load sharing, the switch generates a ptag
error message (PD2-129379272).
Mirroring
Port Mirroring Does Not Work on Rate Shaping Loopback Port
You cannot use port mirroring on a port you have configured as a loopback port for ingress rate
shaping (PD2-243424420).
Delete Mirroring Filters Before Disabling Mirroring
You must delete all mirroring filters before you disable mirroring on the switch. If you attempt to
disable mirroring before deleting the mirroring filters, an error message similar to the following
appears: ERROR: Delete mirrored port(s) before disabling mirroring.
If you see this message, use the
configure mirroring delete command to delete the mirroring filters
followed by the disable mirroring command to disable mirroring (PD2-246368703).
Port from Deleted VLAN Mirrors When Added to New VLAN on Alpine Switch
On an Alpine switch, if you configure a VLAN port for mirroring, delete the VLAN, and then add the
original port to a new VLAN, it is still configured for mirroring (PD3-1757651).