Dell PowerConnect 8100 Release Notes - Page 12

In configuring DHCP scopes, be aware that the DHCP pool address and netmask must exactly match a VLAN address and netmask assignment for DHCP addresses to be served over that VLAN. Only a single manual IP address can be assigned to a pool. The address must have a netmask of 32.  GMRP The GARP Multicast Registration Protocol provides a mechanism that allows networking devices to dynamically register (and de-register) Group membership information with the MAC networking devices attached to the same segment, and for that information to be disseminated across all networking devices in the bridged LAN that support Extended Filtering Services. The PowerConnect Series switches support GMRP as specified in IEEE 802.1Q 1998.  WRED Weighted Random Early Drop is supported on certain PowerConnect series switches. Refer to the table at the beginning of this section for further information. CoS queue configuration involves the following hardware port queue configuration parameters: • scheduler type: strict vs. weighted • minimum guaranteed bandwidth • maximum allowed bandwidth (i.e. shaping) • queue management type: tail drop vs. WRED • tail drop parameters: threshold • WRED parameters: minimum threshold, maximum threshold, drop probability Tail drop and WRED parameters are specified individually for each supported drop precedence level. In addition, the following are specified on a per-interface basis: • queue management type: tail drop vs. WRED (only if per-queue configuration is not supported) • WRED decay exponent Switch administrators should remember to configure ingress ports as trusted or un-trusted. By default ingress ports trust dot1p values.  Stack Firmware Synchronization Stack firmware synchronization updates all stack members to the active firmware version on the master switch. Stack firmware synchronization is enabled by default. Stack firmware downgrade is enabled by default.  Multicast VLAN Registration Multicast VLAN Registration provides a method of coalescing multicast traffic requested by users on multiple VLANs onto a single VLAN when carried over the network. MVR does not require that either source or receiver ports utilize VLAN tagging. Network planners are reminded that multicast groups in the 224.0.0.x range are reserved for multicast control plane traffic. Network planners should select multicast groups in another range for normal multicast traffic, e.g. 239.0.1.x  iSCSI Optimization iSCSI Optimization automatically configures ports for use with the iSCSI protocol and tracks iSCSI sessions on the PowerConnect 7000 and 8000 Series switches as well as the PCM6348. Dell EqualLogic arrays are automatically detected and configuration of Dell EqualLogic connected ports is performed automatically. Administrators are advised that the configuration performed by enabling iSCSI optimization is not automatically reversed on disabling the feature. The administrator will need to manually remove the configuration settings when migrating Dell EqualLogic servers or iSCSI initiator ports to other ports or switches. Detection of Dell EqualLogic arrays is keyed on receipt of the mandatory System Description TLV in the LLDP packet. Disabling LLDP will effectively disable Dell EqualLogic array detection. 10 System Firmware Version 5.1.0.1