MC-LAG commands

mc-lag

Syntax

[no] mc-lag

Context

config>redundancy>multi-chassis>peer>mc-lag

Platforms

Supported on all 7210 SAS platforms as described in this document

Description

Commands in this context configure multi-chassis LAG operations and related parameters.

The no form of this command administratively disables multi-chassis LAG. MC-LAG can only be issued only when mc-lag is shutdown.

hold-on-neighbor-failure

Syntax

hold-on-neighbor-failure multiplier

no hold-on-neighbor-failure

Context

config>redundancy>multi-chassis>peer>mc-lag

Platforms

Supported on all 7210 SAS platforms as described in this document

Description

This command specifies the interval that the standby node will wait for packets from the active node before assuming a redundant-neighbor node failure. This delay in switch-over operation is required to accommodate different factors influencing node failure detection rate, such as IGP convergence, or HA switch-over times and to prevent the standby node to take action prematurely.

The no form of this command reverts to the default value.

Default

3

Parameters

multiplier

Specifies the time interval that the standby node will wait for packets from the active node before assuming a redundant-neighbor node failure.

Values

2 to 25

keep-alive-interval

Syntax

keep-alive-interval interval

no keep-alive-interval

Context

config>redundancy>multi-chassis>peer>mc-lag

Platforms

Supported on all 7210 SAS platforms as described in this document

Description

This command sets the interval at which keep-alive messages are exchanged between two systems participating in MC-LAG. These keep-alive messages are used to determine remote-node failure and the interval is set in deciseconds.

The no form of this command reverts to the default value.

Default

1s (10 hundreds of milliseconds means interval value of 10)

Parameters

interval

Specifies the time interval expressed in deciseconds.

Values

5 to 500

lag

Syntax

lag lag-id lacp-key admin-key system-id system-id [remote-lag remote-lag-id] system-priority system-priority

lag lag-id [remote-lag remote-lag-id]

no lag lag-id

Context

config>redundancy>multi-chassis>peer>mc-lag

Platforms

Supported on all 7210 SAS platforms as described in this document

Description

This command defines a LAG that is forming a redundant pair for MC-LAG with a LAG configured on the given peer. The same LAG group can be defined only in the scope of one peer.

The same lacp-key, system-id, and system-priority must be configured on both nodes of the redundant pair in order for MC-LAG to become operational. In order for MC-LAG to become operational, all of the parameters (lacp-key, system-id, system-priority) must be configured the same on both nodes of the same redundant pair.

The partner system (the system connected to all links forming MC-LAG) will consider all ports using the same lacp-key, system-id, and system-priority as the part of the same LAG. In order to achieve this in MC operation, both redundant-pair nodes have to be configured with the same values. In case of a mismatch, MC-LAG is kept operationally down.

Parameters

lag-id

Specifies the LAG identifier, expressed as a decimal integer. Specifying the lag-id allows the mismatch between lag-id on the redundant pair. If no lag-id is specified, it is assumed that the neighbor system uses the same lag-id as a part of the given MC-LAG. If no matching MC-LAG group can be found between neighbor systems, the individual LAGs will operate as usual (no MC-LAG operation is established).

Values

1 to 25

lacp-key admin-key

Specifies a 16 bit key that needs to be configured in the same manner on both sides of the MC-LAG in order for the MC-LAG to come up.

Values

1 to 65535

system-id system-id

Specifies a 6 byte value expressed in the same notation as MAC address.

Values

xx:xx:xx:xx:xx:xx

xx — 00 to FF

remote-lag remote-lag-id

Specifies the LAG ID on the remote system.

Values

1 to 800

system-priority system-priority

Specifies the system priority to be used in the context of the MC-LAG. The partner system will consider all ports using the same lacp-key, system-id, and system-priority as part of the same LAG.

Values

1 to 65535