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PowerConnect 6224/6224F/6224P/6248/6248P Release Notes

MLD Snooping (RFC2710)

In IPv4, Layer 2 switches can use IGMP Snooping to limit the flooding of multicast traffic by dynamically

configuring Layer 2 interfaces so that multicast traffic is forwarded to only those interfaces associated with

IP multicast address.

In IPv6, MLD snooping performs a similar function. With MLD snooping, IPv6 multicast data is

selectively forwarded to a list of ports intended to receive the data (instead of being flooded to all of the

ports in a VLAN). This list is constructed by snooping IPv6 multicast control packets.

MGMD Proxy

The IGMP Proxy component has been extended to include support for MLD Proxy and is now called the

Multicast Group Membership Discovery (MGMD) Proxy. The MGMD Proxy is used to enable the system

to issue MGMD host messages on behalf of hosts that the system discovered through standard MGMD

router interfaces, thus acting as proxy to all its hosts residing on its router interfaces.

Dynamic ARP Inspection

Dynamic ARP Inspection (DAI) is a security feature that rejects invalid and malicious ARP packets. The

feature prevents a class of man-in-the-middle attacks, where an unfriendly station intercepts traffic for other

stations by poisoning the ARP caches of its unsuspecting neighbors. The miscreant sends ARP requests or

responses mapping another station's IP address to its own MAC address.

Multiple LLDP Neighbors per Interface

This feature allows support for multiple neighbors on a single LLDP interface.

Configurable DSCP for Voice VLAN

Allow the user to configure the voice VLAN DSCP parameter and set the DSCP value. This value is

retrieved by LLDP when the LLDPDU is transmitted (if LLDP has been enabled on the port and the

required TLV is configured for the port).

CDP Interoperability

Allows the ISDP feature to interoperate with Cisco™ devices running CDP.

Industry Standard Discovery Protocol (ISDP) is a proprietary Layer 2 network protocol which inter-

operates with Cisco network equipment and is used to share information between neighboring devices

(routers, bridges, access servers, and switches).

This feature is enabled by default if using phones with CDP enabled, but should be disabled if a

Voice VLAN is manually configured on the

port.

SSH/SSL Refresh

The SSH update incorporates the latest security and bug fixes.

System Firmware Version 3.2.0.6

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