Enhancements

Release M.10.40 Enhancements

If the ARP cache should become full because entries are not cleared (due to increased timeout limits) you can use the clear arp command to remove all non-permanent entries in the ARP cache.

To remove a specific entry in the ARP cache, enter this command:

Syntax: [no] arp IP-ADDRESS

Allows removal of any dynamic entry in the ARP cache.

Release M.10.40 Enhancements

Software fixes only, no new enhancements.

Release M.10.41 Enhancements

Software fixes only, no new enhancements.

Release M.10.42 Enhancements

Software fixes only, no new enhancements.

Release M.10.43 Enhancements

Release M.10.43 includes the following enhancements:

■Enhancement (PR_1000428642) — SNMP v2c describes two different notification-type PDUs: traps and informs. Prior to this software release, only the traps sub-type was supported. This enhancement adds support for informs.

■Enhancement (PR_1000452407) — The Dynamic IP Lockdown feature was added for the 3400cl series switches.

Dynamic IP Lockdown

The Dynamic IP Lockdown feature is used to prevent IP source address spoofing on a per-port and per-VLAN basis. When dynamic IP lockdown is enabled, IP packets in VLAN traffic received on a port are forwarded only if they contain a known source IP address and MAC address binding for the port. The IP-to-MAC address binding can either be statically configured or learned by the DHCP Snooping feature.

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