ELSM Configuration Example

The following example configures ELSM on two ports connected directly to each other and assumes the following:

Note

Note

In the following sample configurations, any lines marked (Default) represent default settings and do not need to be explicitly configured.

Switch A Configuration

  • ELSM-enabled port—Port 1
  • Hello timer—2 seconds
  • Hello threshold—2 hello messages
enable elsm ports 1
configure elsm ports 1 hellotime 2
configure elsm ports 1 hold-threshold 2 (Default)

Switch B Configuration

  • ELSM-enabled port—Slot 2, port 1
  • Hello timer—2 seconds
  • Hello threshold—2 hello messages
enable elsm ports 2:1
configure elsm ports 2:1 hellotime 2
configure elsm ports 2:1 hold-threshold 2 (Default)

After you enable ELSM on the ports, the peers exchange hello messages with each other as displayed in the following figure.

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Extreme Networks Switches with ELSM-Enabled Ports Exchanging Hello Messages
../Graphics/EX_170.svg

To configure ELSM with LAG, enable ELSM on each port member of the LAG, as shown in the following example:

enable sharing 7 grouping 7-9, 41 algorith address-based L2
enable elsm port 7
enable elsm port 8
enable elsm port 9
enable elsm port 41

# sh elsm
Port ELSM State Hello Time
==== ========== ==========
7    Up         1 (secs)
8    Down       1 (secs)
9    Down       1 (secs)
41   Up         1 (secs)