Nortel Networks 40M2420 Cfg/l2/mrst/cist/port port alias or number, Cist Port Configuration, Cost

Alteon OS Command Reference

/cfg/l2/mrst/cist/port <port alias or number>

CIST Port Configuration

[CIST Port 1		Menu]
prior	-	Set port Priority (0-240)
cost	-	Set port Path Cost (1-200000000, 0 for auto)
hello	-	Set CIST port Hello Time (1-10 secs)
link	- Set MSTP link type (auto, p2p, or shared; default: auto)
edge	-	Enable/disable edge port
on	-	Turn port's Spanning Tree ON
off	-	Turn port's Spanning Tree OFF
cur	-	Display current port Spanning Tree parameters

CIST port parameters are used to modify MRST operation on an individual port basis. CIST parameters do not affect operation of STP/PVST+. For each port, RSTP/MSTP is turned on by default.

Table 6-41CIST Port Configuration Menu Options (/cfg/l2/mrst/cist/port)

Command Syntax and Usage

prior <0-240>

Configures the CIST port priority. The port priority helps determine which bridge port becomes the designated port. In a network topology that has multiple bridge ports connected to a single seg- ment, the port with the lowest port priority becomes the designated port for the segment.

The range is 0 to 240, in steps of 16 (0, 16, 32...), and the default is 128.

cost <0-200000000>

Configures the CIST port path cost. The port path cost is used to help determine the designated port for a segment. Generally speaking, the faster the port, the lower the path cost.

The default is 2000 for 10 Gigabit ports, 20000 for Gigabit ports.

hello <1-10 seconds>

Configures the CIST port Hello time.The Hello time specifies how often the root bridge transmits a configuration bridge protocol data unit (BPDU). Any bridge that is not the root bridge uses the root bridge Hello value. The range is 1 to 10 seconds, and the default is 2 seconds.

link <auto, p2p, or shared; default: auto>

Defines the type of link connected to the port, as follows:

auto: Configures the port to detect the link type, and automatically match its settings.

p2p: Configures the port for Point-To-Point protocol.

shared: Configures the port to connect to a shared medium (usually a hub). The default link type is auto.

40M2420, April 2007 Chapter 6: The Configuration Menu „ 229