Port Or Ifindex Offset Issue; Filter Resource Consumption - Nortel 5000 Series Release Notes

VLACP messages. If the time variance of the last 3 VLACP PDUs falls
outside predefined thresholds, the Ethernet Routing Switch 5500/5600 will
remove the link from service.
As a workaround, customers should increase the VLACP timeout value
from the default value of 3 to 5 or more. This will stop the Ethernet Routing
Switch 5500/5600 switches from taking the link down due to the above
mentioned variations in VLACP timing. It should be noted that even though
the timeout value has been set to 5, due to the sampling function, if variance
occurs outside the threshold for any 3 consecutive VLACP PDUs then the
link will be removed from service until VLACP can re-establish a correctly
timed communication. However, a value of 5 has been determined to be
sufficient for this workaround.

Port or ifIndex offset issue

In the past, the SNMP ifIndex assumed that each unit had a maximum of
64 ports, so logical port 65 would be unit 2, port 1 in the stack. Now that
Nortel offers 98 port units on the Ethernet Routing Switch 5600 Series,
there are 128 logical port numbers for each unit. That means that port
129 is unit 2, port 1.
At the SNAS, for 6.0 stacks or switches, use switch_type ERS5500.
If you restart the switch or stack after the stack is up and stable, SNAS
may display incorrect unit and port numbers with a 64 offset, instead of a
128 offset. This is only a display issue and the unit and port numbers are
correct at the switch.
To correct the display at the SNAS, disable and enable the switch at the
SNAS. The display now shows the correct unit and port numbers at the
SNAS.
If your PCs have a connectivity issue, reset DHCP.
The next SNAS patch release will include the Ethernet Routing Switch 5600
Series option and will resolve this issue. (Q01949332)

Filter resource consumption

Various Ethernet Routing Switch 5000 Series applications consume filter
resources. These filter resources are a combination of masks and filters,
sometimes also referred to as rules. A filter specifies the bit pattern to match,
while a mask specifies the bit position to be matched and the evaluation
precedence of the filters. Some applications (for instance, BaySecure, Port
Mirroring, IGMP) require a set number of masks and filters enable them.
Copyright © 2008., Nortel Networks
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Nortel Ethernet Routing Switch 5000 Series
Release Notes — Release 6.0
NN47200-400 04.01 Standard
6.0 12 December 2008
Filter resource consumption 45