08-29-2012 03:21 AM - edited 03-07-2019 08:35 AM
Hi Guys,
Im having trouble verifying an etherchannel on my nexus and 6500..
Now.
I have a VSS distribution layer ( 2x 6500's ) and a bunch of nexus switches plugged into it.
The nexus switch as 1x 10g to one switch and 1x 10g to another in an etherchannel. (MEC)
Same on the VSS, its an etherchannel.
What I cant seem to figure out is if its really up at 20G due to the 2x links in the MEC.
A show int always shows 10G but it does show the members.. So with two members it should be a 20G agreggated MEC..
I had set my BS statement to 20000 but I dont think that really matters anyway..
The same goes for the 6500 end. Its a 10G UP UP port channel. No mention of 20G.
How can I be 100% sure that it is infact running 20G
Thanks
G
port-channel1 is up
Hardware: Port-Channel, address: 547f.ee8c.9ae8 (bia 547f.ee8c.9ae8)
Description: MEC01
MTU 1500 bytes, BW 20000 Kbit, DLY 10 usec
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA
Port mode is trunk
full-duplex, 10 Gb/s
Input flow-control is off, output flow-control is off
Switchport monitor is off
EtherType is 0x8100
Members in this channel: Eth1/1, Eth1/2
Last clearing of "show interface" counters never
30 seconds input rate 4824 bits/sec, 3 packets/sec
30 seconds output rate 4296 bits/sec, 3 packets/sec
Load-Interval #2: 5 minute (300 seconds)
input rate 2.03 Kbps, 2 pps; output rate 960 bps, 0 pps
RX
43 unicast packets 28 multicast packets 1 broadcast packets
72 input packets 8909 bytes
0 jumbo packets 0 storm suppression bytes
0 runts 0 giants 0 CRC 0 no buffer
0 input error 0 short frame 0 overrun 0 underrun 0 ignored
0 watchdog 0 bad etype drop 0 bad proto drop 0 if down drop
0 input with dribble 0 input discard
0 Rx pause
TX
30 unicast packets 24 multicast packets 3 broadcast packets
57 output packets 9612 bytes
0 jumbo packets
0 output errors 0 collision 0 deferred 0 late collision
0 lost carrier 0 no carrier 0 babble 0 output discard
0 Tx pause
3 interface resets
-- CFG
interface port-channel1
description MEC01
switchport mode trunk
switchport trunk allowed vlan 1
duplex full
bandwidth 20000
interface Ethernet1/1
description MEC01
switchport mode trunk
switchport trunk allowed vlan 1
speed auto
duplex full
channel-group 1
interface Ethernet1/2
description MEC01
switchport mode trunk
switchport trunk allowed vlan 1
speed auto
duplex full
channel-group 1
-Graham
Please note: My comments are simply suggestions. I cannot be held liable for any loss of data, life or marbles due to following my instructions.
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08-29-2012 04:36 AM
On a given channel any single conversation will only flow down a single interface of the channel so your total thruput for a given conversation will be 10 gig . You have 20 gig of pipeline to push all traffic as some traffic will go down one interface and some will go down the other interface depending on dist. algorithim you choose.
08-29-2012 03:59 AM
Im fairly sure its all ok.. Just need someone to confirm my thinking
Im assuming that in reality you only get a 10G "flow" at any one time. So you could have multiple flows balanced across the links getting 20G through multiple flows.
08-29-2012 04:36 AM
On a given channel any single conversation will only flow down a single interface of the channel so your total thruput for a given conversation will be 10 gig . You have 20 gig of pipeline to push all traffic as some traffic will go down one interface and some will go down the other interface depending on dist. algorithim you choose.
08-29-2012 04:39 AM
OK cool,
Thanks for your input.
So as I thought, Id get a max of 10G at any one time, However with muplti flows using multiple paths it could do 20G worth of throughput but at a max of 10G on any given flow?
-G
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