Nortel 5000 Series Release Notes page 38

38 Known issues and limitations
Change Request
Number
Q01923243
Q01895935
Q01893906
Q01924380
Q01920139
Q01910052
Q01906093
Q01904918
Q01920502
Q01920498
Q01916316
Copyright © 2008., Nortel Networks
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Description
Ethernet Routing Switch 5000 Series switches do not guarantee data
integrity if you reset the power during the first 5 mins of operation or during a
(periodic) flash sync operation.
ADAC-enabled telephony ports on a base unit may not be re-authenticated
after you reset the stack.
This is a boundary condition for a specific scenario. If you take a small
number of source (S) and group (G) entries and keep on changing the (S, G)
values, the buffer fills and there is no room for a new value.
Workaround: Take a number of (S, G) entries and then do not change the
values of (S, G). You may change the value as long as you do not reach the
maximum for Ethernet Routing Switch 5000 Series switches.
With short stack cables, the software download may fail repeatedly due to
FCS errors. Replace the stack cable if this happens.
PIM:All (S,G) entries do not get installed on SDR or DDR.
Although you may not see this issue in the very first boot, it may happen in
your setup if you do a failover or something else that tries to change the
installed (S,G).
Workaround: a) Keep the number of (S,G) small (under 400) to reduce the
possibility that this problem will occur. b) If you do encounter this issue,
reboot the PIM units in your system to clear the buffer.
When you connect PCs with EAP authentication enabled behind IP phones
that are discovered through ADAC, the authentication process may fail after
stack restart.
Workaround: Disable EAP, reboot the stack and then re-enable EAP.
If you upload the ASCII configuration file from the switch with the front panel
UI button, it may result in a software exception. Use a different user interface
to upload the ASCII configuration.
This is a specific scenario, in which the data is sent through the (distribution
layer) L3 switch (DR) on a VLAN which spans through a L2 switch to another
L3 (non-DR) PIM switch. In a freshly restarted system, you will not see this
issue, but if you reboot the L2 switch, you will not receive the traffic from the
L3 switch (non-DR) that spans in the VLAN across the L2 switch.
Workaround: a) If you have this kind of topology, do not restart the L2 switch
alone. b) If you do reboot the L2 switch and get into this state. then you must
restart the L3 (PIM switches) to reconnect the traffic.
Port Mirroring mode XrxYtx does not work (traffic is not mirrored) after a
restart if the X and Y ports are in different MLTs.
Workaround: Disable and enable the port mirroring mode.
Port Mirroring mode XrxYtx does not monitor broadcast or multicast traffic (in
X and out Y) if the monitor port and X+Y ports are in different VLANs.
When a unit leaves or joins the stack, it disrupts multicast traffic for about
30 seconds.
Nortel Ethernet Routing Switch 5000 Series
Release Notes — Release 6.0
NN47200-400 04.01 Standard
6.0 12 December 2008