Port-channel bundled/unbundled

Is this bundled or not bundled, is what I'm trying to confirm.
I get two conflicting messages about, if the port-channel bundle is working or not working. (There is traffic on two channels intended to bundled)
Version 12.2
Switch1
Config on port 1/1 is encap 820.1q, node (defaul?)
Config on port 9/1 is encap (default?) ,and mode trunk
Switch1 and Switch2 configs are similar
Switch1 extracts
Switch1>sh int po 1 eth
Age of the Port-channel = 01d:04h:02m:05s
Logical slot/port = 14/1 Number of ports = 2
GC = 0x00010001 HotStandBy port = null
Port state = Port-channel Ag-Inuse
Protocol = PAgP
Ports in the Port-channel:
Index Load Port EC state No of bits
------+------+------+------------------+-----------
0 55 Gi1/1 Desirable-Sl 4
1 AA Gi9/1 Desirable-Sl 4
Time since last port bundled: 01d:03h:45m:47s Gi9/1
Time since last port Un-bundled: 01d:03h:57m:35s Gi9/1
=======================================
Switch1>sh int g9/1 trunk
Port Mode Encapsulation Status Native vlan
Gi9/1 on 802.1q trunk-inbndl 1
(Po1)
=========================================
Switch1#sh runn int port-channel 1
Building configuration...
Current configuration : 160 bytes
interface Port-channel1
description EC TO ESW002 G1/1,G9/1
switchport
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 200-202,301
end
Switch1#sh run int g1/1
Building configuration...
Current configuration : 189 bytes
interface GigabitEthernet1/1
description To ESW002 G1/1
switchport
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 200-202,301
channel-group 1 mode desirable
end
Switch1#sh run int g9/1
Building configuration...
Current configuration : 173 bytes
interface GigabitEthernet9/1
description to ESW002 9/1
switchport
switchport trunk allowed vlan 200-202,301
switchport mode trunk
channel-group 1 mode desirable
end

You have setup a trunked etherchannel and it appears to be working correctly. this info tells you that the channel is working correctly, to check the trunk do a "show int trunk" also.
Switch1 extracts
Switch1>sh int po 1 eth
Age of the Port-channel = 01d:04h:02m:05s
Logical slot/port = 14/1 Number of ports = 2
GC = 0x00010001 HotStandBy port = null
Port state = Port-channel Ag-Inuse
Protocol = PAgP
Ports in the Port-channel:
Index Load Port EC state No of bits
------+------+------+------------------+-----------
0 55 Gi1/1 Desirable-Sl 4
1 AA Gi9/1 Desirable-Sl 4

Similar Messages

Port Channel over L2 MPLS links

Hello.
I was hoping that someone could over some suggestions on best practice or recommendations for configuring port channel to bundle to layer 2 MPLS links that we have.
We have racks in two geographically separated data centres, each rack has a stack of Cisco 3850 switches, and there are two 100Mbps layer 2 connections linking these stacks together. The links are provided by our supplier and runs over their core network (I can get more info on their setup if need be).
I had initially just configured a simple port channel bundling the two ports on "Switch A", and the same on "Switch B". However I have since noticed that one of the ports was put into error disabled state, and I have my doubts that we ever had 200Mbps throughput over the portchannel.
The logs showed:
UDLD-4-UDLD_PORT_DISABLED: UDLD disabled interface Gix/x/x, aggressive mode failure detected
%PM-4-ERR_DISABLE: udld error detected on Gix/x/x, putting Gix/x/x in err-disable state
How I understand is that one of ports recieved an unexpected (or incorrect) BPDU packet, and shut the port down as part of spanning tree process to stop a loop forming.
For the time being I have removed the port channel config and re-opened all the ports, so I believe one of the ports is now in blocking state.
Whilst redundancy for these links is great, ideally I would like to have the links bundled so I also get the benefit of higher throughput.
Any thoughts are greatly appreciated.
Thank you

Hi,
Thank you for your reply and suggestions. I have been reading up on layer 2 protocol tunnelling and I'm not sure if this will work for us. According to these guidelines for the catalyst 3550 (http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3550/software/release/12-1_19_ea1/configuration/guide/3550scg/swtunnel.html#wp1006657) it states:
•If you enable PAgP or LACP tunneling, we recommend that you also enable UDLD on the interface for faster link-failure detection.
•Tunneling is not supported on trunk ports. If you enter the l2protocol-tunnel interface configuration command on a trunk port, the command is accepted, but Layer 2 tunneling does not take affect unless you change the port to a tunnel port or an access port.
•EtherChannel port groups are compatible with tunnel ports when the 802.1Q configuration is consistent within an EtherChannel port group.
(maybe its a different and is supported on 3850's)
Also, I cant use layer 3 over this link as I am looking to extend VLANs over the link so devices and virtual machines in each of the datacentre are in the same subnet and broadcast domain.
I will speak with the supplier to see what they are willing to do.
Thanks again.

Port-channel max-bundle option

Hello,
if i have a port-channel with 4 ports in it with LACP. And i want to make two ports as a backup with max bundle command. Do that 'backuped' ports will be just "unselected" from etherchannel, o ir will be physical down ? Thanks
I don't have the LAB yet, so i cant try by myself..

Hi,
The additional 2 ports will be in LACP inactive mode.
HTH

FWSM Default port channel?

I'm doing some L2 cleanups across mutliple 6509E environments and I've found something consistent that I can't find in documentation.
On all my pairs of 6509s where I have FWSMs bundled (6509-A has FWSM-1 is Slot 1 and 6509-B has FWSM-2 in Slot 1) I also have a port channel 305. Obviously when I do a "show run" or "show int desc" I don't see anything in slot one. It's a service module. But the port channel is referencing ports 1/1-6. And it's all in service/up. I was about to delete this as I thought it was some leftover config (TEST 6509s) until I went and saw the same things on our PROD 6509s. Can anyone explain this or provide some documentation on it? Is it cosmetic? Necessary? Can I delete it as part of my audit cleanup? Don't want to mess with it even in TEST without some information. Nothing on google that's clear and I can't find anything on CCO.
6509-1#sho etherch 305 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      N - not in use, no aggregation
        f - failed to allocate aggregator
        M - not in use, no aggregation due to minimum links not met
        m - not in use, port not aggregated due to minimum links not met
        u - unsuitable for bundling
        d - default port
        w - waiting to be aggregated
Number of channel-groups in use: 11
Number of aggregators:           11
Group Port-channel Protocol    Ports
------+-------------+-----------+-----------------------------------------------
305    Po305(SU)        -        Gi1/1(P)       Gi1/2(P)       Gi1/3(P)
                                 Gi1/4(P)       Gi1/5(P)       Gi1/6(P)
Last applied Hash Distribution Algorithm:   -
6509-1#sho etherch 305 det
Group state = L2
Ports: 6   Maxports = 8
Port-channels: 1 Max Port-channels = 1
Protocol:    -
Minimum Links: 0
                Ports in the group:
Port: Gi1/1
Port state    = Up Mstr In-Bndl
Channel group = 305         Mode = On      Gcchange = -
Port-channel = Po305       GC   =   -         Pseudo port-channel = Po305
Port index    = 0           Load = 0x41        Protocol =    -
Age of the port in the current state: 46d:06h:53m:39s
Port: Gi1/2
Port state    = Up Mstr In-Bndl
Channel group = 305         Mode = On      Gcchange = -
Port-channel = Po305       GC   =   -         Pseudo port-channel = Po305
Port index    = 1           Load = 0x02        Protocol =    -
Age of the port in the current state: 46d:06h:53m:39s
Port: Gi1/3
Port state    = Up Mstr In-Bndl
Channel group = 305         Mode = On      Gcchange = -
Port-channel = Po305       GC   =   -         Pseudo port-channel = Po305
Port index    = 2           Load = 0x04        Protocol =    -
Age of the port in the current state: 46d:06h:53m:41s
Port: Gi1/4
Port state    = Up Mstr In-Bndl
Channel group = 305         Mode = On      Gcchange = -
Port-channel = Po305       GC   =   -         Pseudo port-channel = Po305
Port index    = 3           Load = 0x88        Protocol =    -
Age of the port in the current state: 46d:06h:53m:41s
Port: Gi1/5
Port state    = Up Mstr In-Bndl
Channel group = 305         Mode = On      Gcchange = -
Port-channel = Po305       GC   =   -         Pseudo port-channel = Po305
Port index    = 4           Load = 0x10        Protocol =    -
Age of the port in the current state: 46d:06h:53m:41s
Port: Gi1/6
Port state    = Up Mstr In-Bndl
Channel group = 305         Mode = On      Gcchange = -
Port-channel = Po305       GC   =   -         Pseudo port-channel = Po305
Port index    = 5           Load = 0x20        Protocol =    -
Age of the port in the current state: 46d:06h:53m:41s
                Port-channels in the group:
Port-channel: Po305
Age of the Port-channel   = 46d:06h:55m:56s
Logical slot/port   = 14/11          Number of ports = 6
GC                  = 0x00000000      HotStandBy port = null
Port state          = Port-channel Ag-Inuse
Protocol            =    -
Fast-switchover     = disabled
Load share deferral = disabled
Ports in the Port-channel:
Index   Load   Port     EC state        No of bits
------+------+------+------------------+-----------
0     41     Gi1/1    On    2
1     02     Gi1/2    On    1
2     04     Gi1/3    On    1
3     88     Gi1/4    On    2
4     10     Gi1/5    On    1
5     20     Gi1/6    On    1
Time since last port bundled:    46d:06h:53m:41s    Gi1/6
Last applied Hash Distribution Algorithm:   -
NOC-SW-ITEST-AGG1#

The connection between the FWSM and the switch is a 6-GB 802.1Q trunking EtherChannel. This EtherChannel is automatically created when you install the FWSM.
http://cisconetwork.org.ua/1587051893/ch04lev1sec1.html
http://www.cisco.com/en/US/docs/security/fwsm/fwsm23/configuration/guide/switch.pdf
Thanks
Ajay

Port channel WLC 5508 and 3750

Hi All,
I want to configure Port channel for WLC 5508 and cisco 3750 Stack Switch. What changes I need to make on WLC and where?
Thanks
Jagdev

Thanks Chris,
LAG is enable on WLC, and Port channel is configured on 3750, Please see the configration and Port channel status below:-
(Cisco Controller) >show lag summary
LAG Enabled
interface Port-channel14
description Port Channel to WLC001
switchport trunk encapsulation dot1q
switchport mode trunk
end
sh etherchannel 14 summary
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: 14
Number of aggregators:           14
Group Port-channel Protocol    Ports
------+-------------+-----------+-----------------------------------------------
14     Po14(SD)        LACP      Gi1/0/22(I) Gi2/0/22(I)
sh run int g1/0/22
Building configuration...
Current configuration : 209 bytes
interface GigabitEthernet1/0/22
description Trunk to WLC001 DistPort1
switchport trunk encapsulation dot1q
switchport trunk native vlan 254
switchport mode trunk
channel-group 14 mode active
end
sh run int g2/0/22
Building configuration...
Current configuration : 209 bytes
interface GigabitEthernet2/0/22
description Trunk to WLC001 DistPort2
switchport trunk encapsulation dot1q
switchport trunk native vlan 254
switchport mode trunk
channel-group 14 mode active
end

Ironport S380 - Port Channel for P1/P2 - & - Bypass Traffic Mechanism

Dear Team,
One of my customer has purchased WSA S380.
1. He has a requirement to bundle P1/P2 Ports and create a port-channel in a switch. Is it Possible ? If No, then what can be the Solution ?
2. Also, Is it possible to detect failover, means if our WSA will go down then will it able to bypass the traffic ? If yes then please explain how can we achieve that ?
Thanks.
Milin

1. no, you can't port channel the WSA.
2. It depends on how you get the traffic to the WSA. Are you using transparent redirection (eg WCCP), then yes, when the WSA goes down, it will be detected and traffic will quit being redirected to it. If you're using explicit redirection, it won't be detected, unless you have 2 WSAs and you cluster them.
Once you get the first WSA up and running, you can request a virtual license and install a vWSA and use that for fail over...

How to troubleshooting port channel in N7K

i find N5K
http://www.cisco.com/c/en/us/support/docs/switches/nexus-5000-series-switches/116199-technote-stp-00.html
i notice distribution switch has root guard block log
does it mean that looping has occured yesterday?
i use command below do not have yesterday record
show spanning-tree internal event-history tree 1 brief | in "2015:03:15 10"
first core is root switch
now port channel shutdown in first core and use port channel in second core. How can i see which problem has occurred in port channel ?
how to know which port has problem ?
how to know which vlan caused the problem ?
we notice one of access switch has lost config, will it affect the distribution layer switch?
i remember that yesterday i just get log with filezilla after configure notebook same vlan and same network with the testing access switch

Not sure if youre after the portchannel bandwidth or port-channel speed... If you really want to get an insight on the bandwidth usage, get SNMP on both sides, actively monitor the port channel and interfaces (real time by frequent polling)
And you could get two endpoints @ 10 gb nics that are bundled, then 'thrash' the link, end to end. I use iperf, you could use big ftp transfers to test and see what performance is. You'll get the rate / speed in which the links are operating 'end to end'
It may mean that the ports are @10gb full duplex, but the overall bandwidth is 20gb
Sent from Cisco Technical Support iPhone App

VSS port channel options

Hi,
I am converting 2 6500 chassis to VSS, currently they are configured as primary & backup. Downstream switch have 4 uplinks, 2 to each chassis with port channels. After I convert to VSS I will have all 4 ports connecting to downstream switch in a port channel, can I keep 2 separate port channels on downstream switch or will it cause issues ?
thanks
hasrat

Hi Hazrat,
I agree with Reza. By the way what is at your mind in keeping 2 seperate port-channels to one device?(please note after VSS logically it is one switch). One of the Port-channel will not be used at all since spanning tree will block it. So as Reza said bundle them in all one.
Thanks,
Madhu

What is the maximum number of physical link we can bind to a ether-channel and port-channel

Hi,
I was studying about port-channel & ether-channel and found that, it can be bind up-to 8 ports. So maximum number, we can have of 8 ports or more ?
For binding we should have minimum of 2 ports or 1 ports will work ? For load-balancing purpose, is the port no. would be in a bundle of 2,4 and 8 ?
Thanks

Hi Kathik,
I have gone through one document. It's saying the below mentioned things :
Jun 7, 2012 9:36 PM (in response to Sarabjit)
Re: What is the maximum number of etherchannels we can have?
The maximum number of Etherchannels varies from platform to platform. The maximum number of ports in an etherchannel is either 8 ro 16 depending on the platform. The minimum number of ports in an etherchannel bundle is 1.
Jun 8, 2012 1:27 AM (in response to Sarabjit)
Re: What is the maximum number of etherchannels we can have?
Etherchannels is a Cisco term. Other vendors call them 802.3ad trunks. It's common to see something like this in datasheets:
48 ports 10/100/1000 Mbit/s
802.3ad:
Maximum of 32 groups
Maximum of 8 ports per group
The document url is https://learningnetwork.cisco.com/thread/43680
The another document says the below mentioned things :
Matrix of Load Balancing Methods
This matrix consolidates the load balancing methods that this document describes:
Platform
Address Used in XOR
Source-Based?
Destination-Based?
Source-Destination-Based?
Load Balancing Method—Configurable/Fixed?
6500/6000
Layer 2, Layer 3 addresses, Layer 4 information, or MPLS information2
Yes
Yes
Yes
Configurable
5500/5000
Layer 2 address only
Yes
Cannot change the method
4500/4000
Layer 2, Layer 3 addresses, or Layer 4 information
Yes
Yes
Yes
Configurable
2900XL/3500XL
Layer 2 address only
Yes
Yes
Configurable
3750/3560
Layer 2 or Layer 3 address only
Yes
Yes
Yes
Configurable
2950/2955/3550
Layer 2 address only1
Yes
Yes
—1
Configurable
1900/2820
These platforms use a special method of load balancing. See theCatalyst 1900/2820 section for details.
8500
Layer 3 address only
Yes
Cannot change the method
1 For the 3550 series switch, when source-MAC address forwarding is used, load distribution based on the source and destination IP address is also enabled for routed IP traffic. All routed IP traffic chooses a port based on the source and destination IP address.
2 For the 6500 series switches that run Cisco IOS, MPLS layer 2 information can also be used for load balancing MPLS packets.
The document url is http://www.cisco.com/c/en/us/support/docs/lan-switching/etherchannel/12023-4.html
Another document says the below mentioned things for load-balancing :
inally, here is full list of valid load-distribution methods:
•dst-ip—Load distribution on the destination IP address
•dst-mac—Load distribution on the destination MAC address
•dst-port—Load distribution on the destination TCP/UDP port
•src-dst-ip—Load distribution on the source XOR destination IP address
•src-dst-mac—Load distribution on the source XOR destination MAC address
•src-dst-port—Load distribution on the source XOR destination TCP/UDP port
•src-ip—Load distribution on the source IP address
•src-mac—Load distribution on the source MAC address
•src-port—Load distribution on the source port
The document url is https://learningnetwork.cisco.com/thread/63064
Please suggest.

Nexus 1010v interfaces, port-channel, Catalyst 6500E VSS

I'm installing a pair of 1010v-X appliances using flexible network option 5 on version 4.2(1)SP1(5.1).
I have all interfaces grouped into a single port channel 6. All interfaces uplink to a pair of Catalyst 6506Es in a VSS (Sup2T).
My question relates to the VSS configuration.
For example, do I set up one port-channel on the VSS and put all 12 interfaces in it? Or, do I set up two port-channels on the VSS and put the active 1010v-X in one port-channel and the standby into another port-channel?
Do I set dot1q trunking up on the port-channel(s) on the VSS?
Thanks.

Hi,
What version of IOS are you running on the ASAs?
see table-12-3 in this link:
http://www.cisco.com/c/en/us/td/docs/security/asa/asa84/configuration/guide/asa_84_cli_config/interface_start.html
Also, since the 4500x are in VSS mode, you need to bundle one link from each switch and use LACP.
HTH

ASA5550 port channel configuration ERROR: nameif not allowed on empty etherchannel interface

Hi All,
I am having problem when configure port channel on asa5550
IOS ver asa914-k8.bin also in ver 9.02   and 8.47.
Please let me know how can I solve this problem.
UK-LON-FW(config)# int port-channel 3
UK-LON-FW(config-if)# vlan 245
                       ^
ERROR: % Invalid input detected at '^' marker.
UK-LON-FW(config-if)# nameif secure
ERROR: nameif not allowed on empty etherchannel interface.
UK-LON-FW(config-if)#
here is my interfaces configuration:
interface GigabitEthernet0/0
description fw1:G0/0 to uk-lon-gw1:e1/8 fw2:G0/0 to uk-lon-gw2:e1/9 outside zone
channel-group 1 mode on
no nameif
no security-level
no ip address
interface GigabitEthernet0/1
description fw1:G0/1 to uk-lon-gw2:e1/8 fw2:G0/1 to uk-lon-gw1:e1/9 outside zone
channel-group 1 mode on
no nameif
no security-level
no ip address
interface GigabitEthernet0/2
description fw1:G0/2 to uk-lon-sw1a:1 fw2:G0/2 to uk-lon-sw1a:2 dmz
channel-group 2 mode on
no nameif
no security-level
no ip address
interface GigabitEthernet0/3
description fw1:G0/3 to uk-lon-sw1b: fw2:G0/3 to uk-lon-sw1b:2 dmz
channel-group 2 mode on
no nameif
no security-level
no ip address
interface Management0/0
management-only
nameif management
security-level 0
ip address 10.10.51.18 255.255.254.0
interface GigabitEthernet1/0
description fw1:G1/0 to uk-lon-sw1a:3 fw2:G1/0 to uk-lon-sw1a:4 secure zone
no nameif
no security-level
no ip address
interface GigabitEthernet1/1
description fw1:G1/1 to uk-lon-sw1b:3 fw2:G1/1 to uk-lon-sw1b:4 secure zone
no nameif
no security-level
no ip address
interface GigabitEthernet1/2
description LAN Failover Interface
no nameif
no security-level
no ip address
interface GigabitEthernet1/3
description STATE Failover Interface
no nameif
no security-level
no ip address
interface Port-channel1
description outside zone
no nameif
no security-level
no ip address
interface Port-channel1.5
description outside zone Bundle FW:G0/0-G0/1 connect to GW1:e1/8-GW2:e1/8
vlan 5
nameif outside
security-level 0
ip address 216.239.105.5 255.255.255.128 standby 216.239.105.6
interface Port-channel2
description dmz Bunlde uk-lon-fw:G0/2-3 to sw1a:1-2 sw1b:1-2
no nameif
no security-level
no ip address
interface Port-channel2.105
description dmz
vlan 105
nameif dmz
security-level 50
ip address 216.239.105.193 255.255.255.192 standby 216.239.105.194
interface Port-channel3
description secure zone Bunlde uk-lon-fw:G1/0-1 to sw1a:3-3 sw1b:3-4
no nameif
security-level 100
ip address 10.254.105.1 255.255.255.0 standby 10.254.105.2
UK-LON-FW(config-if)#

Hi Marvin,
Thank you for your answer. I did everything but it did not work. Turn out it is a bug ver 8.45 will let you created the sub logical interface but actually it did not work right. Verson 9.x doesn't let you create more than 2 port channel (limitation of ASA5550 hardware).
https://tools.cisco.com/bugsearch/bug/CSCtq62715/?reffering_site=dumpcr
Also, you can see the 8.4 release notes were you can see that it is not supported:
http://www.cisco.com/c/en/us/td/docs/security/asa/asa84/release/notes/asarn84.html#pgfId-522232
Interface Features
EtherChannel support (ASA 5510 and higher)
You can configure up to 48 802.3ad EtherChannels of eight active interfaces each.
Note You cannot use interfaces on the 4GE SSM, including the integrated 4GE SSM in slot 1 on the ASA 5550, as part of an EtherChannel.
We introduced the following commands: channel-group , lacp port-priority , interface port-channel , lacp max-bundle , port-channel min-bundle , port-channel load-balance , lacp system-priority , clear lacp counters , show lacp , show port-channel .

Storm Control on Port-Channel Interfaces (6500 platform)

Hello.
I cannot find it anywhere in the documentation for the Cisco 6500 platform (IOS). The question is this: When calculating the percentage of broadcast passing through a Port-Channel interface, which total bandwidth figure is used by the switch? For example:
a. If we have a bundle of 4 Gig interfaces in a PortChannel with Storm-Control applied, the threshold will be calculated over 4Gb/s or 1Gb/s?
b. If the same PortChannel for some reason loses 2 of the uplinks in the Bundle, will the calculation be made over 4Gb/s, 2Gb/s or 1Gb/s?
Thanks!

Hi Leo,
I can't find any reference to this at the moment, but my thoughts are that it will be based on a single member port of the port-channel.
Remember that a port-channel is logically a single link and so a broadcast is only sent on one of the links of the port-channel and not all of them. The decision as to which link is used will be the same as for any other frame i.e., the broadcast address is used within the hashing calculation to choose the physical port.
If the storm-control values are determined based upon the aggregate bandwidth, and changes as links are added/removed from the agregate, then the suppression threshold values for link carrying the broadcasts is never going to be correct.
Regards

Xconnect 20Gb Port-channel over MPLS Possible?

Can anybody confirm if you can establish an Xconnect between two 20Gb port-channels (2x 10Gig bundle). The core is 40Gig and running MPLS. We have many gigabit pseudowires running over it already.
Our intention is to terminate 10Gig server traffic on 4900M's and then have a 20Gb Port channel trunk link into a 6500 (which is part of the MPLS cloud). We would then issue the xconnect directly on the 20Gig port channel in order to traverse the MPLS Core.
Has anyone configured this before? Are there any caveats to watch out for? What sort of performance hit (if any does) xconnect functionality have on 10Gig Traffic.

Hi,
Yes it's supported but test it first (as always ;-) )
HTH
Laurent.

20gbit Port-channels using sfp+ ports

Hi,
I am hoping to implement a cost affective solution that can utilise the uplinks ports on the 2960-X & XR series switch and the appropriate up/downlink modules for the 3750-X series switch
Would anyone know if it is possible to bundle the 10gbit sfp+ ports into a 20gbit port-channel?
Has anyone done this or could they point me in the right direction for documentation?
Thanks

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In no event shall Author be liable for any damages whatsoever (including, without limitation, damages for loss of use, data or profit) arising out of the use or inability to use the posting's information even if Author has been advised of the possibility of such damage.
Posting
BTW, don't forget, you only have two 10g ports per 3750X.

Why don't channel-group numbers match on a VSS port-channel link?

Hi All,
I have two 6509's that are VSS'd together via four 10gig links on each side. The configuration was done before I started this job, but in reviewing the configs I see that the 10gbps VSS heartbeat links are port-channeled together on each side, but one side is channel-group 2, while the other end of the bundle is channel-group 1.
I thought that channel-group numbers needed to match on both ends of the port-channel for it to form correctly?
I'm guessing that this has to happen because the switches are virtually one, so you can't put all 8 links into the same channel-group number or there would be nothing to connect to on the other side. Therefore, the "switch virtual link #" command is the real code that tells the switch where the other end of the link is, regardless of channel-group number, correct?

Dean,
The channel-group number does not have to be the same on each end. The four ports on switch A have to be in the same channel-group, and the four ports on switch B have to be in the same channel-group, but there's no communication across that line about what the channel-group is called. It's just a name. From a design standpoint it is nice to have them the same on both sides, but it's not always simple to allow for that in the design of a network.
-Jameson

Port-channel bundled/unbundled

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