MINOR: LAGMGR #1015 - Autonegotiate must be Off or Limited for 1/1/4

[plawansai]

Why do I see this warning

Thank you very much.

[paramount]

Hi,

This is to avoid a port going to half duplex etc or to a different speed when part of a lag group - as all ports must be the same speed etc.

So you must indeed for a 10/100/1000 type port set the autoneg to either off or limited (where it is only allowed to autoneg at certain speed/duplex etc).

Hope this helps
paramount

[plawansai]

Do you mean for a 10/100/1000 need no autonegotiate command when configure lag

Thank you very much.

[mivens]

Either "no autonegotiate" or "autonegotiate limited".

Each LAG member must only advertise that it supports a single speed and duplex.

The Interface Configuration Guide says:

When autonegotiation is disabled on a port, the port does not attempt to autonegotiate and will only operate at the speed and duplex settings configured for the port. Note that disabling autonegotiation on Gb ports is not allowed as the IEEE 802.3 specification for Gb Ethernet requires autonegotiation be enabled for far end fault indication.

If the autonegotiate limited keyword option is specified the port will auto-negotiate but will only advertise a specific speed and duplex. The speed and duplex advertised are the speed and duplex settings configured for the port. One use for limited mode is for multi-speed Gb ports to force Gb operation while keeping autonegotiation enabled for compliance with IEEE 801.3.

7750 SR OS requires that autonegotiation be disabled or limited for ports in a Link Aggregation Group to guarantee a specific port speed.

and

Ports of a particular LAG can be of different types but they must be the same speed and duplex. To guarantee the same port speed is used for all ports in a LAG, autonegotiation must be disabled or in limited mode to ensure only a specific speed is advertised. For 10GBE ports, the xgig setting must be set to the same value.