Port Channerl - Mode LACP

[flielguera]

Hello, I will define a Port-Channel Interface in mode LACP, in a Switch Catalyst 3850:

!
interface Port-channel4
 switchport mode access
end

To this port-channel interface, I associate two interfaces:

!
interface GigabitEthernet1/0/4
 description -- PC03-ADM --
 switchport mode access
 channel-group 4 mode passive
end

YN-NW-GB06-170#sh run int g2/0/4
Building configuration...

Current configuration : 120 bytes
!
interface GigabitEthernet2/0/4
 description -- PC03-ADM --
 switchport mode access
 channel-group 4 mode passive
end

When I check the status of the interfaces, I see :

YN-NW-GB06-170#sh etherchannel 4 summ
Flags:  D - down        P - bundled in port-channel
        I - stand-alone s - suspended
        H - Hot-standby (LACP only)
        R - Layer3      S - Layer2
        U - in use      f - failed to allocate aggregator

        M - not in use, minimum links not met
        u - unsuitable for bundling
        w - waiting to be aggregated
        d - default port

Number of channel-groups in use: 4
Number of aggregators:           4

Group  Port-channel  Protocol    Ports
------+-------------+-----------+-----------------------------------------------
4      Po4(SU)         LACP      Gi1/0/4(P)  Gi2/0/4(s) 

YN-NW-GB06-170#sh int g1/0/4
GigabitEthernet1/0/4 is up, line protocol is up (connected)
  Hardware is Gigabit Ethernet, address is f078.16c4.fb04 (bia f078.16c4.fb04)
  Description: -- PC03-ADM --
  MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Full-duplex, 1000Mb/s, media type is 10/100/1000BaseTX
  input flow-control is off, output flow-control is unsupported
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input 00:00:12, output never, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/2000/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 578000 bits/sec, 489 packets/sec
     6345 packets input, 808991 bytes, 0 no buffer
     Received 3591 broadcasts (241 multicasts)
     0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 241 multicast, 0 pause input
     0 input packets with dribble condition detected
     1674339 packets output, 183387434 bytes, 0 underruns
     0 output errors, 0 collisions, 3 interface resets
     0 unknown protocol drops
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier, 0 pause output
     0 output buffer failures, 0 output buffers swapped out
YN-NW-GB06-170#sh int g2/0/4
GigabitEthernet2/0/4 is up, line protocol is down (suspended)
  Hardware is Gigabit Ethernet, address is f0b2.e591.d284 (bia f0b2.e591.d284)
  Description: -- PC03-ADM --
  MTU 1500 bytes, BW 1000000 Kbit/sec, DLY 10 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Full-duplex, 1000Mb/s, media type is 10/100/1000BaseTX
  input flow-control is off, output flow-control is unsupported
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input never, output never, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/2000/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 0 bits/sec, 0 packets/sec
  5 minute output rate 0 bits/sec, 0 packets/sec
     0 packets input, 0 bytes, 0 no buffer
     Received 0 broadcasts (0 multicasts)
     0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 0 multicast, 0 pause input
     0 input packets with dribble condition detected
     138082 packets output, 26616915 bytes, 0 underruns
     0 output errors, 0 collisions, 3 interface resets
     0 unknown protocol drops
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier, 0 pause output
     0 output buffer failures, 0 output buffers swapped out
YN-NW-GB06-170#

I ask, this is the normal behavior of the interfaces in this mode, or I have made error.

Please your help in this matter.

Regards.

Fernando.

[Philip D'Ath]

It sounds like the channel has not formed.  Try this command to check:

show etherchannel summary 

Try using active mode rather than passive mode.

[flielguera]

Hello, thanks for the fast response, I will try to change to mode active.

This is the output of the command:

YN-NW-GB06-170#sh etherchannel summ
Flags:  D - down        P - bundled in port-channel
        I - stand-alone s - suspended
        H - Hot-standby (LACP only)
        R - Layer3      S - Layer2
        U - in use      f - failed to allocate aggregator

        M - not in use, minimum links not met
        u - unsuitable for bundling
        w - waiting to be aggregated
        d - default port

Number of channel-groups in use: 4
Number of aggregators:           4

Group  Port-channel  Protocol    Ports
------+-------------+-----------+-----------------------------------------------
1      Po1(SU)          -        Gi1/1/1(P)  Gi2/1/1(P) 
2      Po2(SD)          -        Gi1/0/1(D)  Gi1/0/2(D)  Gi2/0/1(D) 
                                 Gi2/0/2(D) 
3      Po3(SD)          -        Gi1/0/3(D)  Gi2/0/3(D) 
4      Po4(SU)         LACP      Gi1/0/4(P)  Gi2/0/4(s) 

YN-NW-GB06-170#

Please, do you have if any special configuration for Microsoft Server 2012 r2 and Port-Channel LACP...???

Regards.

Fernando

[Philip D'Ath · Accepted solution]

Check out this article:

http://anotheritblog.net/2014/08/19/windows-server-2012-lacp-nic-teaming-on-cisco-catalyst/

I think once you change it to active mode the Cisco end will be correct.

[flielguera]

Thanks so much for you Help.

Regards.

Fernando.

[syed kazim abbas]

Hi,

P.Dath show you good article, according to my consideration you also need a software to download on server end. check out.

https://www.microsoft.com/en-us/download/details.aspx?id=40319

Regards,

Kazim abbas

[flielguera]

Also, thanks so much for you help.

Regards.

[syed kazim abbas]

If your problem solved, please mark as question answered.

Regards,