Summary - L2 features

Here are tables to find some Layer 2 features.

• Etherchannel

SW A	SW B	MODE	STANDARD
Desirable Desirable	Auto Desirable	PAgP	Cisco
Active Active	Passive Active	LACP	802.3ad
On	On	Manual	-

• Port Protected

VIOLATION MODE	SEND SNMP	SEND SYSLOG	VIOLATION COUNTER	SHUTDOWN PORT (DEFAULT)
Protect	No	No	No	No
Restrinct	Yes	Yes	Yes	No
Shutdown	Yes	Yes	Yes	Yes

• Spanning-Tree

To infuence Election Root :

• spanning-tree vlan ID root primary
• spanning-tree vlan ID priority 4096 (Default : 32768, the lowest wins)

To influence the port's feature of a non root switch :

1. interface fastX/X
2. spanning-tree vlan ID cost VALUE

Reminder :

• 10 Mb, VALUE = 100,
• 100 Mb, VALUE = 10,
• 1 Gb, VALUE = 4,
• 10 Gb, VALUE = 2.

To influence the port's feature of a root Switch :

1. interface fastX/X
2. spanning-tree vlan ID port-priority VALUE (Defaut : 128, the lowest wins)