Specifications

Features in 291-14 36
Version 291-18
C613-10488-00 REV Q
CR00020266 Switching 2 If a network event caused the switch to flush its layer 2 forwarding
database (FDB) for a port, in some circumstances the switch also flushed
hardware ARP entries that hardware layer 3 routes were still using. Possible
triggers included an STP topology change somewhere else in the network,
or a link flap on a port. Depending on the network configuration and/or
network traffic, this issue could result in incorrectly layer 3 switched traffic.
This issue has been resolved.
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CR00020413 DHCP
snooping,
IGMP snooping
2 IGMP snooping did not correctly snoop IGMP traffic that arrived on an
untrusted DHCP snooping port.
This issue has been resolved. IGMP packets are processed now, unless IP
filtering is enabled in DHCP snooping. Note that IP filtering is enabled by
default, so the switch will drop IGMP packets by default if DHCP snooping
does not have the source host as a current valid entry in the DHCP snooping
database.
To disable or enable IP filtering in DHCP snooping, use the commands:
disable dhcpsnooping ipfiltering
enable dhcpsnooping ipfiltering
DHCP snooping must be enabled for IP filtering to take affect, but IP
filtering cannot be disabled or enabled while DHCP snooping is enabled.
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CR00020759 Switching 2 On AT-8948 switches running version 291-13, SFPs did not work—the link
did not come up. This issue has been resolved.
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CR Module Level Description
AR44x / AR450 AR7x5 AR750S / AR770S Rapier i Rapier w AT-8800 AT-8600 AT-8700XL AT-8948 / x900-48 AT-9900 AT-9800