Configuring Layer 3 Ether Channel

To configure Layer 3 EtherChannel, you create the port-channel logical interface and then put the E interfaces into the port channel. The no switchport command must be used on the port channel a physical interface. The steps and syntax used to create a Layer 3 EtherChannel are as follows:

Step 1. Configure the port channel, disable Layer 2 switching, and assign an IP address to ti channel, as follows:

3550_switch(config)#interface port-channel [1-64] 3550_switch(config-if)#no switchport

3550_switch(config-if)#ip addressaddress subnet mask

Step 2. Configure the phys . cal interfaEes th at w. ll reside iw the EtrenChannel group and assic port chann e^ as followsc

3550_switch(config)#interfaceinterface name 3550_switch(config-if)#no switchport

3550_switch(config-if)#channel-group [1-64]mode {auto [non-silent] | desirable non-silent] | on}

Exam ple 1- 20 demonst<ates the conrigutation oI a Layur 3 EtheLCh anne l w i th an H addness o0 172 Example 1-20. Configuring Layer 3 EtherChannel

3550_switch(config)#interface port-channel 2

3550_switch(config-if)#no switchport

3550_switch(config-if)#ip address

3550_switch(config-if)#exit 3550_switch(config)#interface fast 0/17 3550_switch(config-if)#channel-group 2 mode auto 3550_switch(config-if)#interface fast 0/18 3550_switch(config-if)#no switchport 3550_switch(config-if)#channel-group 2 mode auto

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