User guide

Open Problem Reports and Feature Exceptions
OmniSwitch 6600/7000/8800—Release 5.1.5.R04 page 49
PR 59907
If IP multicast switching is configured along with group mobility, and multiple clients are configured in
different IP VLANs on the same physical port, multiple copies of the same packet can be routed to that
port causing duplicate delivery of IP multicast traffic on the OS7000. Note: IP multicast routing must also
be enabled, and multiple clients in different subnets must request the IP multicast traffic from the same
physical port.
Workaround: The CLI command ip multicast hardware-routing may be used to remedy this problem.
This will ensure that only one copy of the packet will be forwarded out any switch port. Please see restric-
tions in using ip multicast hardware routing in the user manual. Note: The route selected for transmitting
the multicast to the port will be selected randomly which may cause problems with TTL threshold and
multicast scoping.
PR 61590
If one (1) Gb/s multicast traffic, composed of one or several streams, is sent on only one port per EGRESS
NI on the OS7000, wire rate is not achieved. The speed is limited to around 600Mb/s whatever the packet
size.
Workaround: There is no known workaround at this time.
PR 69039
Cannot achieve wire rate multicast performance between stack elements on an OS6624/6648. Standalone
performance is wire rate.
Workaround: There is no known workaround at this time.
PR 72334
IPMS may not learn all flows if flooded with many new flows in a short period of time. Flows will flood
during learning process.
Workaround: Retry joining multicast group again.
PR 75172
On the OS7000, IGMP memberships may be lost if the hosts reside on the NI having high CPU utilization.
Workaround: There is no known workaround at this time.
PR 77650
On the OS7000, IPMS doesn't allow for the configuration of static entities for link aggregation trunks by
trunk number.
Workaround: Link aggregation trunks can be configured instead by specifying the primary port of the
link aggregate group.