Cabletron Systems SmartSwitch 6000 User Manual - Smartswitch Router (Ssr)
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Introduction
Compatibility - DEC Hunt Groups and
SmartSwitch Router (SSR)
SmartTrunking for the SmartSwitch 6000 and the SmartSwitch 9000 is based on,
and compatible with, DEC Hunt Groups. With the SSR adopting the DEC Hunt
Groups protocol, this will allow all Cabletron equipment to be trunked to each
other. (See firmware release notes for the compatibility of the individual image
selected.)
SmartTrunking and Hunt Groups are comprised of two protocols:
•
Logical Link Aging Protocol (LLAP) - Assists in learning and aging.
•
Physical Link Affinity Protocol (PLAP) - Monitors and maintains the trunking
states.
Chassis with Multiple SmartTrunking Groups
Figure 1-1 depicts a simple example of a network using Cabletron devices that
support SmartTrunk. In this example, a module supporting SmartTrunk in a
SmartSwitch 9000 chassis has multiple groups of ports using SmartTrunks. The
SmartSwitch 9000 module acknowledges both the SmartSwitch 6000 module and
the SmartSwitch 2200 chassis. Thus, the SmartSwitch 9000 module has “multiple
groups,” when viewing LM and NMS (Network Management Software) screens.
A group is defined as a trunk connection between a chassis and/or a standalone
switch. In Figure 1-1, the 2200 and 6000 each have one group of trunking with two
ports. The 9000 module has two groups with two ports in each instance.
SmartTrunk can be configured in a number of different ways. Links can be made
from multiple ports on a standalone SmartSwitch to one or more standalone or
individual chassis-based SmartSwitches. When trunking from a standalone
switch to a chassis-based switch, the trunk ports need to be connected to the same
board in the chassis.