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Dell PowerEdge FN I/O Module Configuration Guide 9.10(0.0)

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Adding a Physical Interface to a Port Channel

The physical interfaces in a port channel can be on any line card in the chassis, but must be the same physical type.

  • NOTE: Port channels can contain a mix of Gigabit Ethernet and 10/100/1000 Ethernet interfaces, but Dell Networking OS disables the interfaces that are not the same speed of the first channel member in the port channel.
You can add any physical interface to a port channel if the interface configuration is minimal. You can configure only the following commands on an interface if it is a member of a port channel:
  • description
  • shutdown/no shutdown
  • mtu
  • ip mtu (if the interface is on a Jumbo-enabled by default)
  • NOTE:
A logical port channel interface cannot have flow control. Flow control can only be present on the physical interfaces if they are part of a port channel.

To view the interface’s configuration, enter INTERFACE mode for that interface and use the show config command or from EXEC Privilege mode, use the show running-config interface interface command.

When an interface is added to a port channel, Dell Networking OS recalculates the hash algorithm.

To add a physical interface to a port, use the following commands.

  1. Add the interface to a port channel. INTERFACE PORT-CHANNEL mode channel-member interface This command is applicable only in PMUX mode. The interface variable is the physical interface type and slot/port information.
  2. Double check that the interface was added to the port channel. INTERFACE PORT-CHANNEL mode show config
To view the port channel’s status and channel members in a tabular format, use the show interfaces port-channel brief command in EXEC Privilege mode, as shown in the following example.

Example of the show interfaces port-channel brief Command 

Dell#sh int port-channel brief
                                    Codes: L - LACP Port-channel
                                    O - OpenFlow Controller Port-channel
                                    
                                    LAG  Mode  Status       Uptime      Ports
                                    L   1    L2    up           00:00:19    Te 0/7     (Up)
                                    Te 0/8     (Up)
                                    L   128  L2    up           00:00:36    Te 0/9     (Up)
                                    Te 0/10    (Up)
                                    Te 0/11    (Up)
                                    Dell#

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.

Example of the show interface port-channel Command 

Dell#show interface port-channel 1
                                    Port-channel 1 is down, line protocol is down
                                    Hardware address is 00:1e:c9:de:04:9c, Current address is 00:1e:c9:de:04:9c
                                    Interface index is 1107492865
                                    Minimum number of links to bring Port-channel up is 1
                                    Internet address is not set
                                    Mode of IPv4 Address Assignment : NONE
                                    DHCP Client-ID :001ec9de049c
                                    MTU 1554 bytes, IP MTU 1500 bytes
                                    LineSpeed auto
                                    Members in this channel:
                                    ARP type: ARPA, ARP Timeout 04:00:00
                                    Last clearing of "show interface" counters 02:57:05
                                    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, 0 wreddrops
                                    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: 02:57:05
                                    
                                    Dell#

When more than one interface is added to a Layer 2-port channel, Dell Networking OS 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.

Example of Error Due to an Attempt to Configure an Interface that is Part of a Port Channel 

Dell(conf)#int port-channel 128
                                    Dell(conf-if-po-128)#show config
                                    !
                                    interface Port-channel 128
                                    mtu 12000
                                    portmode hybrid
                                    switchport
                                    fip-snooping port-mode fcf
                                    no shutdown
                                    link-bundle-monitor enable
                                    Dell(conf-if-po-128)#

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