White Papers

The following example shows the port channel’s mode (L2 for Layer 2 and L3 for Layer 3 and L2L3 for a Layer 2-port channel
assigned to a routed VLAN), the status, and the number of interfaces belonging to the port channel.
Dell#show int port-channel
Port-channel 1 is down, line protocol is down
Hardware address is 00:1e:c9:f1:00:05, Current address is 00:1e:c9:f1:00:05
Interface index is 1107755009
Minimum number of links to bring Port-channel up is 1
Internet address is not set
Mode of IP Address Assignment : NONE
DHCP Client-ID :lag1001ec9f10005
MTU 1554 bytes, IP MTU 1500 bytes
LineSpeed auto
Members in this channel: Te 0/16(D)
ARP type: ARPA, ARP Timeout 04:00:00
Last clearing of "show interface" counters 00:05:44
Queueing strategy: fifo
Input Statistics:
0 packets, 0 bytes
0 64-byte pkts, 0 over 64-byte pkts, 0 over 127-byte pkts
0 over 255-byte pkts, 0 over 511-byte pkts, 0 over 1023-byte pkts
0 Multicasts, 0 Broadcasts
0 runts, 0 giants, 0 throttles
0 CRC, 0 overrun, 0 discarded
Output Statistics:
0 packets, 0 bytes, 0 underruns
0 64-byte pkts, 0 over 64-byte pkts, 0 over 127-byte pkts
0 over 255-byte pkts, 0 over 511-byte pkts, 0 over 1023-byte pkts
0 Multicasts, 0 Broadcasts, 0 Unicasts
0 throttles, 0 discarded, 0 collisions
Rate info (interval 299 seconds):
Input 00.00 Mbits/sec, 0 packets/sec, 0.00% of line-rate
Output 00.00 Mbits/sec, 0 packets/sec, 0.00% of line-rate
Time since last interface status change: 00:05:44
When more than one interface is added to a Layer 2-port channel, the system selects one of the active interfaces in the port
channel to be the primary port. The primary port replies to flooding and sends protocol data units (PDUs). An asterisk in the
show interfaces port-channel brief command indicates the primary port.
As soon as a physical interface is added to a port channel, the properties of the port channel determine the properties of the
physical interface. The configuration and status of the port channel are also applied to the physical interfaces within the port
channel. For example, if the port channel is in Layer 2 mode, you cannot add an IP address or a static MAC address to an
interface that is part of that port channel.
In the following example, interface GigabitEthernet 1/6 is part of port channel 1, which is in Layer 2 mode, and an error message
appeared when an IP address was configured.
Dell(conf-if-po-1)#show config
!
interface Port-channel 1
no ip address
channel-member TenGigabitEthernet 0/16
shutdown
Dell(conf-if-po-1)#
Dell(conf-if-po-1)#int tengig 1/6
Dell(conf-if)#ip address 10.56.4.4 /24
% Error: Te 1/6 Port is part of a LAG.
Dell(conf-if)#
Reassigning an Interface to a New Port Channel
An interface can be a member of only one port channel. If the interface is a member of a port channel, remove it from the first
port channel and then add it to the second port channel.
To reassign an interface to a new port channel, use the following commands.
1. Remove the interface from the first port channel.
INTERFACE PORT-CHANNEL mode
no channel-member interface
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Interfaces