Reference Guide

432 | Interfaces
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Figure 20-13. show interfaces port-channel brief Command Example
Figure 20-14 displays 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.
Figure 20-14. show interface port-channel Command Example
When more than one interface is added to a Layer 2 port channel, FTOS selects one of the active interfaces
in the port channel to be the Primary Port. The primary port replies to flooding and sends protocol 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. As Figure 20-15
illustrates, interface GigabitEthernet 1/6 is part of port channel 5, which is in Layer 2 mode, and an error
message appeared when an IP address was configured.
FTOS#show int port brief
LAG Mode Status Uptime Ports
1 L2L3 up 00:06:03 Gi 13/6 (Up) *
Gi 13/12 (Up)
2 L2L3 up 00:06:03 Gi 13/7 (Up) *
Gi 13/8 (Up)
Gi 13/13 (Up)
Gi 13/14 (Up)
FTOS#
FTOS>show interface port-channel 20
Port-channel 20 is up, line protocol is up
Hardware address is 00:01:e8:01:46:fa
Internet address is 1.1.120.1/24
MTU 1554 bytes, IP MTU 1500 bytes
LineSpeed 2000 Mbit
Members in this channel: Gi 9/10 Gi 9/17
ARP type: ARPA, ARP timeout 04:00:00
Last clearing of "show interface" counters 00:00:00
Queueing strategy: fifo
1212627 packets input, 1539872850 bytes
Input 1212448 IP Packets, 0 Vlans 0 MPLS
4857 64-byte pkts, 17570 over 64-byte pkts, 35209 over 127-byte pkts
69164 over 255-byte pkts, 143346 over 511-byte pkts, 942523 over 1023-byte pkts
Received 0 input symbol errors, 0 runts, 0 giants, 0 throttles
42 CRC, 0 IP Checksum, 0 overrun, 0 discarded
2456590833 packets output, 203958235255 bytes, 0 underruns
Output 1640 Multicasts, 56612 Broadcasts, 2456532581 Unicasts
2456590654 IP Packets, 0 Vlans, 0 MPLS
0 throttles, 0 discarded
Rate info (interval 5 minutes):
Input 00.01Mbits/sec, 2 packets/sec
Output 81.60Mbits/sec, 133658 packets/sec
Time since last interface status change: 04:31:57
FTOS>