Dell PowerEdge M820 Systems Release Notes - Page 14

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 User Configurable CLI Banners

Administrators may configure banners for the following: MOTD, login, and exec. The banners may consist of multiple

lines of text. Each new line will consume an extra two characters (CR/LF) that count against the maximum length

banner that can be configured.

 Captive Portal

Captive portal has been extended to support user logout and localization.

 802.1Q

The following changes have been made to the operation of VLANs.

VLAN Membership:

By default, all VLANs are members of a trunk port. VLANs created after a trunk port is created are added to all trunk

ports. VLANs deleted by the administrator are removed from all trunk ports. The operator may configure a trunk port

to explicitly disallow certain VLANs.

Native VLAN Configuration on Trunk Ports:

It is now possible to configure the native VLAN on a port in trunk mode. Trunk mode ports will accept untagged

frames but will always transmit tagged frames. It is also possible to configure a trunk port to drop untagged frames by

filtering on the native VLAN, e.g. by using the switchport trunk allowed vlan remove command.

Switchport Mode Configuration Preserved:

When switching between switchport modes (access, trunk, and general), the switchport configuration applicable to the

selected mode is maintained. This means that when switching from one mode to another and back, the port will have

the same configuration as it had in the original mode. Only the configuration applicable to the selected mode is enabled

on the port.

 VRRP

The following enhancements have been made to the operation of VRRP to increase usability and robustness of

operation in the network:

Preemption Delay:

Per the VRRP RFC 3768, when preemption is enabled, the backup router discards advertisements until the master

down-timer fires. When the preemption delay timer is set to a non-zero value and the backup switch receives a PDU

with a lower priority from the master, then backup switch waits for the preemption delay value before advertising itself

as the master.

Timer Advertisement Learning:

In VRRP, all participating routers should be configured with coherent advertisement timer interval values. The

operator can now enable timer learning which causes a backup router to learn the master advertisement interval and

change its master down interval accordingly.

Ping-able VRRP Interfaces:

RFC 3768 specifies that a router may only accept IP packets sent to the virtual router's IP address if the router is the

address owner (master). In practice, this restriction makes it more difficult to troubleshoot network connectivity

problems.

System Firmware Version 4.1.0.6