Dell Networking 7048 Release Note page 16

Changed Functionality in this Release
This section contains commentary on significant differences from previous releases of firmware on PowerConnect switches, e.g.
the 8132/8164/8132F/8164F/7024/7048/7024P/7048P/7024F/7048R/7048R-RA/M6348/M6220/M8024/8024/8024F/M8024-k
switches. Dell PowerConnect series switches closely conform to networking industry standard operational capabilities and
administrative interfaces. The differences below should be studied carefully as attempting to configure or operate the
PowerConnect switches in the same manner as for previous releases of firmware for PowerConnect
8132/8164/8132F/8164F/7024/7048/7024P/7048P/7024F/7048R/7048R-RA/M6348/M6220/M8024/8024/8024F/M8024-k
switches may lead to unexpected results.
Release 5.1.0.1
 IGMP Snooping
IGMP snooping is enabled by default.
Traffic addressed to reserved multicast IP addresses is flooded.
Unregistered multicast is flooded to all ports in the VLAN until a multicast router port is identified.
Once mrouter port is identified the traffic is forwarded to mrouter port and listener ports only.
 PIMSM
PIMSM Rendezvous Points can be positioned anywhere in the network, not just as the first hop router. Although
multiple Rendezvous Points can be configured, only one Rendezvous Point is active at any time.
 Auto-Configuration
Auto-configuration recognizes any of the assigned internal switch's MAC addresses when present in an auto-
configuration file. The switch re-writes the file to use the base MAC address of the switch.
 Dot1x Clients
The maximum number of 802.1x clients (i.e. supplicants) that can be authenticated per port is increased to 24. This
increase does not include a corresponding increase in the maximum number of 802.1x clients that are supported on an
entire switch or stack.
Release 5.0.1.3
 No Changed Functionality in this Release
Release 5.0.0.4
 Stacking Ports Change
The maximum number of ports that can be configured for stacking per switch is limited to 8. This is done to ensure that
the Hardware limits for maximum stack trunk members are not exceeded.
 Stacking Over QSFP+ Ports
Stacking is supported over standard QSFP+ ports at either 1x10G or 4x10G mode. The ports must be configured as
stacking ports.
 Bootcode upgrade
Bootcode program is enhanced to automatically upgrade bootcode on migrating switches from pre-4.x version to 5.x
version.
Release 4.2.2.3
 No Changed Functionality in this Release
14 System Firmware Version 5.1.0.1