CISCO ACI - Port Channel

[Jv]

Hi,

I was looking to get the command to see the bandwidth available in port-channel on ACI. But unfortunately not able to find same.

Basically i was looking for below command available in catalyst 

sh int port-channel 1
Port-channel1 is up, line protocol is up (connected)
Hardware is EtherChannel, address is 005f.8602.f52e (bia 005f.8602.f52e)
MTU 1500 bytes, BW 20000000 Kbit/sec, DLY 10 usec,
reliability 255/255, txload 1/255, rxload 20/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 10Gb/s, link type is auto, media type is
input flow-control is off, output flow-control is unsupported
Members in this channel: Te1/0/46 Te2/0/46
ARP type: ARPA, ARP Timeout 04:00:00 

Tried the same command on Leaf 1, But output differs. 

Leaf1# sh int po20
stats unavailable
port-channel20 is up
admin state is up,
Hardware: Port-Channel, address: e00e.da2a.0596 (bia e00e.da2a.0596)
MTU 9000 bytes, BW 10000000 Kbit, DLY 10 usec
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, medium is broadcast
Port mode is trunk
full-duplex, 10 Gb/s

Further investigating what i saw is each switch create int port-channel with different tag i.e po36,po76 etc.

Wanted to understand how ACI handle port-channel across the fabric.

Thanks

[Jason Williams]

Jv, 

Could you provide the output of 'show port-channel summary' from leaf1? 

Jason

[Jv]

Hi Jason,

From Leaf 1

Group Port- Channel      Type       Protocol        Member Ports        

20         Po20(SU)            Eth          LACP         Eth1/4(P)

From Leaf 2

Group Port- Channel      Type       Protocol        Member Ports

41         Po41(SU)           Eth            LACP      Eth1/4(P)

CDP info from Catalyst

Device ID Local Intrfce Holdtme Capability Platform        Port ID
Leaf1      Ten 1/0/46       160         R S C     N9K-C9372   Eth 1/4
Leaf2     Ten 2/0/46        124         R S C    N9K-C9372    Eth 1/4

We have LACP 20G between 2 Leafs and Catalyst.

I am actually interested so see the bandwidth available in port-channel, as its showing in catalyst (BW 20000000 Kbit/sec)

Above output says Eth1/4 in leaf 1 is part of port-channel 20 and Eth 1/4 in Leaf 2 it assigned to port-channel 41.

But i in catalyst and NX-OS, we keep interfaces in same port-channel group.

So, wants to know how ACI handles port-channel.

Thanks,

[Jason Williams · Accepted solution]

This is not specific to ACI. It is purely a port-channel and VPC concept. The reported bandwidth is local to the switch, even if that port-channel is part of a VPC. Port-channel 20 on has 1 physical port; therefore, it can only support up to 10000000 Kbit. Same goes for Po41 on leaf2. Add the 2 bandwidths together and you get 20000000 Kbit. 

If you added more port-channel members to leaf 1 and 2, then you should see the bandwidth increase. 

Your catalyst switch shows 20000000 Kbit because it has 2 ports on the same switch bundled into a channel. 

-Jason