Stacking 3750s and Port Channel

We're replacing legacy switches with 3750s in the coming months, and I have a question about stacking and port channel.
The 3750s will be Layer 2 switches, and each will be uplinked via Gigabit fiber to a pair of 6500s acting as Layer 3 distribution switches.
One thing I'm not sure about is if it will be possible to built Port Channel links for 2, 3, or 4 GB across different switches, or if I can only put Port Channels on the same switch. My understanding is with stacking it appears as one big switch and I can built Port Channels however I want, but am not 100% if this design will work.

You can certainly configure EtherChannels across different 3750s in the same stack, thus avoiding your single point of failure by having the aggregate ports all in one switch.
However in the scenario the port channel has to be configured explicitly to ON, PaGP is not supported across stack members.
3750 stack switches appear as a single logical switch with a single management address. From which you can configure all physical ports. It is important to remember that you configure your switch priorities accordingly in order to govern which switch is your master, and also set a secondary.
Regards
Allan.
Please kindly rate this post if you find this information helpful.

Similar Messages

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.

WLC LAG Mode and Port Channel

So I was reading the controller best practices and got this:
When you use LAG, the controller relies on the switch for the load balancing decisions on traffic that come from the network. It expects that traffic that belongs to an AP always enters on the same port. Use only ip-src or ip-src ip-dst load balancing options in the switch EtherChannel configuration. Some switch models might use unsupported load balancing mechanisms by default, so it is important to verify.
This is how to verify the EtherChannel load balancing mechanism:
switch#show etherchannel load-balance
EtherChannel Load-Balancing Configuration:
src-dst-ip
EtherChannel Load-Balancing Addresses Used Per-Protocol:
Non-IP: Source XOR Destination MAC address
IPv4: Source XOR Destination IP address
IPv6: Source XOR Destination IP address
This is how to change the switch configuration (IOS):
switch(config)#port-channel load-balance src-dst-ip
Now Cisco switches by default will do src-mac. If I make this change obviously this would be a global change. I don't believe it should cause any performance issues but wanted to get some expert opinions on this. Switches my controller will be connected to will also have two routers connected as well via Port Channel.
I'm trying to understand the reasoning behind this.

I've never seen that command cause any issues in any deployment I've worked on.
HTH,
Steve

Difference between Trunk links and port channel

Hi
Can anyone please explain me the difference between the Trunk links and Ether channel ?

Disclaimer
The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.
Liability Disclaimer
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
As the other posters have already described, in Cisco parlance, a "trunk" is a link that carries VLAN tagged frames. (Note, Cisco has two technologies for these, ISL [old/proprietary] and IEEE 802.1Q [vendor independent].) An Etherchannel (also called a port-channel) is one logical link that includes one or more physical links. (Note, although Etherchannel can run across just one link, normally more than one link is configured. Older and most Cisco implementations support up to 8 links in one channel bundle. There's also multiple Cisco technologies that support Etherchannels, such as manual/PAgP[Cisco/old]/LACP[IEEE 802.3ad].)
Trunk links might also be configured on an Etherchannel link.

Unable to stack 3750 and 3750X

I am unable to stack the below switches. I am getting error of incompatible software. Please advise. I am trying to add to 3750x which is the higher version.
Switch Ports Model SW Version SW Image
* 2 26 WS-C3750-24P 12.2(35)SE5 C3750-IPBASE-M
Switch Ports Model SW Version SW Image
* 1 54 WS-C3750X-48P 12.2(55)SE8 C3750E-UNIVERSALK9-M

Disclaimer
The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.
Liability Disclaimer
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
Two additions to what Leo has already noted.
Would suggest moving to (55)SE9, and believe your 3750X will need a IPBase or IPServices license. (I.e. if 3750X is licensed for LANBase, it may not work.)

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

3750-2960 Vlans Issue via Port Channel

Im trying to get all my vlans to pass thru to my 2960 user level switches, from my 3750 stack.
Each one of my 2960 stack is connected to my 3750 via port channel. Here is my port setup.
I have Vlans 1,210,214,216,220,306,406 on my 3750 stack. I cannot see those vlans on my 2960 stack. Why is that? What am I missing from the config?
Thanks...
3750 ports:
interface GigabitEthernet1/0/41
description Uplink to ETHSW03
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 1,210,214,216,220,306,406
switchport mode trunk
snmp trap mac-notification change added
snmp trap mac-notification change removed
spanning-tree guard loop
channel-protocol lacp
channel-group 7 mode active
interface GigabitEthernet1/0/42
description Uplink to ETHSW03
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 1,210,214,216,220,306,406
switchport mode trunk
snmp trap mac-notification change added
snmp trap mac-notification change removed
spanning-tree guard loop
channel-protocol lacp
channel-group 7 mode active
interface Port-channel7
description Uplink to ETHSW03
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 1,210,214,216,220,306,406
switchport mode trunk
snmp trap mac-notification change added
snmp trap mac-notification change removed
spanning-tree guard loop
Here are my 2960 ports setup:
interface GigabitEthernet1/0/47
description Uplink to CORE01
switchport trunk allowed vlan 1,210,214,216,220,306,406
switchport mode trunk
snmp trap mac-notification change added
snmp trap mac-notification change removed
spanning-tree guard loop
channel-protocol lacp
channel-group 1 mode active
interface GigabitEthernet1/0/48
description Uplink to CORE01
switchport trunk allowed vlan 1,210,214,216,220,306,406
switchport mode trunk
snmp trap mac-notification change added
snmp trap mac-notification change removed
spanning-tree guard loop
channel-protocol lacp
channel-group 1 mode active
interface Port-channel1
description Uplink to CORE01
switchport trunk allowed vlan 1,210,214,216,220,306,406
switchport mode trunk
snmp trap mac-notification change added
snmp trap mac-notification change removed
spanning-tree guard loop

I have 1 stack of 3750, connected with flex technology.
I have 3 stacks of 4-2960s, connected with flex technology.
Then, each 2960 stack is connected to my 3750 stack via port channels (gig ports x2).
Now, this is a second office site. We are connected to our datacenter via private ethernet line, and thats where most of our vlans and servers reside.
Output from 3750
P-DB-CORE01#sh vtp status
VTP Version capable             : 1 to 3
VTP version running             : 1
VTP Domain Name                 : NULL
VTP Pruning Mode                : Disabled
VTP Traps Generation            : Disabled
Device ID                       : 6c41.6a9c.a280
Configuration last modified by 10.2.20.1 at 3-3-93 23:43:55
Feature VLAN:
VTP Operating Mode                : Transparent
Maximum VLANs supported locally   : 1005
Number of existing VLANs          : 19
Configuration Revision            : 0
MD5 digest                        : 0x3D 0x05 0x4D 0x8C 0x31 0x07 0x34 0xDA
                                    0x2F 0x60 0xE8 0x24 0xA6 0x27 0x59 0x24
Output from 2960
P-ETHSW03-20.4#sh vtp status
VTP Version capable             : 1 to 3
VTP version running             : 1
VTP Domain Name                 : NULL
VTP Pruning Mode                : Disabled
VTP Traps Generation            : Disabled
Device ID                       : c07b.bcb2.9a80
Configuration last modified by 10.2.20.2 at 1-3-14 13:02:15
Local updater ID is 10.2.20.4 on interface Vl1 (lowest numbered VLAN interface found)
Feature VLAN:
VTP Operating Mode                : Server
Maximum VLANs supported locally   : 255
Number of existing VLANs          : 7
Configuration Revision            : 5
MD5 digest                        : 0x89 0x91 0xBA 0xE3 0x12 0x1B 0xDB 0x1D
                                    0x75 0x43 0x7F 0x8D 0x62 0x5A 0x09 0x70

Create port channel between UCS-FI and MDS 9124 (F Mode)

Dear Team,
We were trying to create port channel between UCS FI and MDS 9124
But the port channel not getting active in F mode on MDS 9124
FI is in FC End Host Mode
We have enabled FC uplink trunking on FI
We have enabled NPIV on MDS
We have enabled trunk on MDS
FI and MDS in default VSAN
To check we changed the FI mode to FC Switching mode and port channels became active but in E mode
when we enabled FC uplink trunking on FI and FC Switching mode port channels became active in TE mode
but in both the above cases showflogi database shows WWPN of SAN alone not showing any from FI.
How to achive this?
Have read that no need to change the swicthing mode to FC Switching mode and keep as FC Endhost mode
SO how to achieve Port channel with F mode in MDS and FI ( Mode showing as NProxy)
Does it has to do anything with MDS NX-OS version? (https://supportforums.cisco.com/thread/2179129)
If yes how to upgrade as license for ports came along with Device and we do not have any PAC/PAK or license file as it came
with license
Also we have seen 2 files availabe for download (m9100-s2ek9-kickstart-mz.5.2.8b.bin and m9100-s2ek9-mz.5.2.8b.bin) which to use
Thanks and Regards
Jose

Hi Jo Bo,
what version of software if your MDS running?
On your UCS do connect nxos and show inteface brieft and look at the mac address.
it is possible that you might be hitting the bug below. if this is the case you might need to upgrade the firmware on your MDS.
Add MAC OUI "002a6a", "8c604f", "00defb" for 5k/UCS-FI
http://tools.cisco.com/Support/BugToolKit/search/getBugDetails.do?method=fetchBugDetails&bugId=CSCty04686
Symptom:
Nexus switch unable to connect any other Nexus or other Cisco Switch in NPV mode with a F port-channel. Issue might be seen in earlier 5.1 releases like
5.1.3.N1.1a
but not the latest
5.1.3.N2.1c
release. Issue is also seen in
5.2(1)N1(1)
and
6.0(2)N1(1)
and later releases.
Conditions:
Nexus configured for SAN PortChannels or NPIV trunking mode Nexus connected to UCS via regular F port channel where UCS in NPV mode NPV edge switch: Port WWN OUI from UCS FI or other Cisco manufactured switch: xx:xx:00:2a:6a:xx:xx:xx OR xx:xx:8c:60:4f:xx:xx:xx
Workaround:
Turn-off trunking mode on Nexus 5k TF-port Issue does not happen with standard F-PORT Remove SAN Portchannel config
Further Problem Description:
To verify the issue please collect show flogi internal event-history errors Each time the port is attempted OLS, NOS, LRR counters will increment. This can be determined via the following output, show port internal info all show port internal event-history errors

SGE2010 port-channel and trunking config question

I have port-channels configured and working for the native VLAN on multiple SGE2010s. I now want to add multiple VLANs and enable trunking for the port-channel. I am not clear on the appropriate way to enable trunking as it can be enabled on the port and on the port-channel. The ports and port-channel are currently in access mode. If anyone can provide the correct configuration, I would appreciate the guidance. I also need to get the port-channels and trunking working with 3Com 4500 & 4200s. If you know of any configuration issues, again any guidance would be appreciated

Hi Jacqueline,
Sorry Juans answer needs some correction, but I am grateful for Juans participation.
The SGE2010 does not support a CLI.
There is a unsupported CLI, that someone plastered somehwere on this community, but i must admit i still like to use the GUI.
The software on the SGE2XXX was recently updated so you can find that on the cisco.com website.
I have created a link below to a recording i just made, regarding Link aggregation on the SGE2XXXX, i thnk if you see the 11 minute recording a couple of times, maybe pause it, play with your switch, it will start to make sense.
you can't breat the switch by configuring it
click here to see a recording of me creating a Link aggregation between two switches
regards Dave

6880X VSS Port-Channel

Hi
I was trying to configure two 6800x switches as a VSS pair, Ive done this on 4500x switches before and worked a treat. when setting up a L2 port-channel, for some reason it puts the ports into routed mode and does not allow me to build a L2 port-channel.
So I add the following config for the port-channel
Interface port-channel 10
Description VSL_Link
switchport
switch virtual link 2
no shut
Interface range Tengig 1/1 – 1/2
Description VSL_Link
switchport mode trunk
channel-group 10 mode on
Now as soon as I type the channel-group 10 mode on, it gives an error
"Command rejected (Port-channel10): Either port is L2 and port-channel is L3, or vice-versa"
I managed to create a L2 port-channel on a 4500x, will the 6800x only allow me to create a l3 port channel.

Hi
I tried this config on the 4500x and it worked, now I have also added the switchport mode trunk command to both the port-channel and interface and still getting the same error.
When I do sh int status, the ports are showing as routed
I cleared the config and first set both interface as trunks, then when I do the channel-group 10 mode on command, it accepts the command an automatically creates the port-channel, but the interfaces show as routed.
This is my first time using a 6880x, when i logged into it, the default hostname is set to Router. I was expecting it to be named Switch, not that the hostname affects the config but makes me wonder, is the config different for the 6880x as opposed to other L3 switches

7200/7301 MTU issue on Port-Channel

Hi guys,
I have an issue with MTU on port-channel :
When I create a port-channel interface, I can set MTU to 1530 max
When I configure an interface in this port-channel, I can set port-channel MTU to 9216 max.
But when I reload, "mtu 9216" command is rejected and port-channel MTU is set to 1500 :
mtu 9216
^
% Invalid input detected at '^' marker.
%Interface MTU set to channel-group MTU 1500.
IOS version is 12.4(25g)
Thank you so much.

Hi guys,
I have an issue with MTU on port-channel :
When I create a port-channel interface, I can set MTU to 1530 max
When I configure an interface in this port-channel, I can set port-channel MTU to 9216 max.
But when I reload, "mtu 9216" command is rejected and port-channel MTU is set to 1500 :
mtu 9216
^
% Invalid input detected at '^' marker.
%Interface MTU set to channel-group MTU 1500.
IOS version is 12.4(25g)
Thank you so much.

Port-channel issues

We installed a CISCO 6509e with 2 Sup 720 blades in one building that is about 600m from our corporate HQs. We have a CISC 4507 with 2 Sup 6-E with 10G. We have them connected with fiber using 10g gbic LMR optics in the 10g ports of the sup blades. The link comes up. We moved it to a trunk and set up port channeling. The link will come up as a trunk but the port channel is not coming up. We are at a bit of a loss, we have several closets through the 2 buildings and we utilize port channeling on all of our switches. Below are the interfaces for the 2 interfaces and port channels, we had hoped to add more interfaces to this port channel but we are on hold until we can determine the reason for the port channel not coming up.
6509E
interface Port-channel4
switchport
switchport trunk encapsulation dot1q
switchport mode trunk
interface TenGigabitEthernet5/4
description B2B 10G
switchport
switchport trunk encapsulation dot1q
switchport mode trunk
channel-group 4 mode auto
GigabitEthernet5/3 unassigned YES manual down down
TenGigabitEthernet5/4 unassigned YES unset up up
Port-channel4 unassigned YES unset down down
4507
interface Port-channel8
switchport
switchport mode trunk
interface TenGigabitEthernet1/1
description CORE-TO-CORE
switchport mode trunk
channel-group 8 mode desirable
TenGigabitEthernet1/1 unassigned YES unset up up
Port-channel8 unassigned YES unset down down

The physical port-channel configuration don't match. 4500 is "desirable" while the 6500 is "auto".

Port channel issue in ASA

We have two Cisco ASA 55XX Firewalls and both are in HA (Active/Standy). Two ports from each Firewall is connecting two ports of Nexus 5K Switch and running port channel between Firewall & Nexus Switch and port-channel is UP. And Switches having back to back connection with allowed all VLAN trunk port.
FW01 ----------------- SW01 (Two ports with Port channel)
FW02 ----------------- SW02 (Two ports with Port channel)
I have VLAN 10 with IP Subnet 10.10.10.0/28
SW01 : 10.10.10.2
SW02 : 10.10.10.3
HSRP IP : 10.10.10.1
FWs : 10.10.10.4 & 10.10.10.5
Firewall Default Gateway : 10.10.10.1
Problem : I am not able Ping Firewall IPs from Nexus Switches. When I checked ARP table in Nexus Switch; I have observed that Firealls two IPs having same MAC address; when I checked that MAC address in the Firewall; that MAC address is Port channel interface MAC address.
This is issue (two IPs learing same MAC address) from ASA.
How to fix this issue ?
Thanks
Venkat

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

Host Flapping Between Port Channel

Hi,
I have 2 VSS Pair (4X6509E) Switch. First VSS Pair is configured as Server Core and Second VSS Pair is configured as LAN Core. There is a port channel Port 10 with 4Port configured between Server and LAN Core. We have also couple Wireless LAN Controllers (5508) Connected to Server Core. PortChannel 25 from Wireless LAN Controller 1 and Portchannel 26 from Wireless LAN Controller 2. (Only 1 controller will be acitve at a time)
My issue is that am getting a MAC Flapping error between Port Channel 25 and Port Channel 10. I tried cleard the MAC entry and from ARP found the IP is LAN Core SVI.
"%MAC_MOVE-SW1_SP-4-NOTIF: Host ec30.91e1.2f80 in vlan 80 is flapping between port Po26 and port Po10"
show arp#
Internet 10.50.200.254          23   ec30.91e1.2f80 ARPA   Vlan50
VLAN 80 is WIreless Guest VLAN.
Please guide me in isolating the issue.
Toplolgy file is attached and also 6509-E is ruuning IOS "s72033-ipservicesk9_wan-mz.122-33.SXI3.bin"

SERVER-CORE
interface Port-channel10
switchport
switchport trunk encapsulation dot1q
switchport trunk native vlan 50
switchport trunk allowed vlan 2-4094
switchport mode trunk
no mls qos channel-consistency
interface TenGigabitEthernet1/6/1
switchport
switchport trunk encapsulation dot1q
switchport trunk native vlan 50
switchport trunk allowed vlan 2-4094
switchport mode trunk
channel-protocol pagp
channel-group 10 mode desirable non-silent
nterface TenGigabitEthernet1/6/3
switchport
switchport trunk encapsulation dot1q
switchport trunk native vlan 50
switchport trunk allowed vlan 2-4094
switchport mode trunk
shutdown
channel-protocol pagp
channel-group 10 mode desirable non-silent
interface TenGigabitEthernet2/6/1
switchport
switchport trunk encapsulation dot1q
switchport trunk native vlan 50
switchport trunk allowed vlan 2-4094
switchport mode trunk
channel-protocol pagp
channel-group 10 mode desirable non-silent
interface TenGigabitEthernet2/6/3
switchport
switchport trunk encapsulation dot1q
switchport trunk native vlan 50
switchport trunk allowed vlan 2-4094
switchport mode trunk
channel-protocol pagp
channel-group 10 mode desirable non-silent
interface Port-channel25
description *****Connected to QOC-WLC1*****
switchport
switchport trunk encapsulation dot1q
switchport mode trunk
interface GigabitEthernet1/1/3
switchport
switchport trunk encapsulation dot1q
switchport mode trunk
channel-group 25 mode on
interface GigabitEthernet1/1/4
switchport
switchport trunk encapsulation dot1q
switchport mode trunk
channel-group 25 mode on
interface Port-channel26
switchport
switchport trunk encapsulation dot1q
switchport mode trunk
interface GigabitEthernet2/1/3
switchport
switchport trunk encapsulation dot1q
switchport mode trunk
channel-group 26 mode on
interface GigabitEthernet2/1/4
switchport
switchport trunk encapsulation dot1q
switchport mode trunk
channel-group 26 mode on
SERVER-CORE#show etherchannel summary
Group Port-channel Protocol    Ports
------+-------------+-----------+-----------------------------------------------
1      Po1(RU)          -        Te1/5/4(D)     Te1/5/5(P)
2      Po2(RU)          -        Te2/5/4(D)     Te2/5/5(P)
10     Po10(SU)        PAgP      Te1/6/1(P)     Te1/6/3(D)     Te2/6/1(P)     Te2/6/3(P)
25     Po25(SU)         -        Gi1/1/3(P)     Gi1/1/4(P)
26     Po26(SU)         -        Gi2/1/3(P)     Gi2/1/4(P)

How to configure a port channel with VLAN trunking (and make it work..)

We're trying to configure a port channel group with trunked ports to connect a NetApp HA pair. We want to create two data LIFs and connect them to the switch stack. We are trying to create 2 data lifs, one for cifs and one for nfs that are on different vlans.
We want the same ports to be able to allow multiple vlans to communicate. (trunked)
These data lifs should be able to fail over to different nodes in the HA pair and still be able to communicate on the network.
What this means is that we have to connect 4 ports each for each node in the NetApp HA Pair to the switches and create a port channel of some type that allows for trunked vlans. When we configure the ports, the configuration is as follows (below):
We are only able to configure an IP on one of the vlans.
When we configure an IP from another vlan for the data lif, it does not respond to a ping.
Does anyone have any idea what I'm doing wrong on the Cisco switch?
interface GigabitEthernet4/0/12
description Netapp2-e0a
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 10,20,511,519
channel-protocol lacp
channel-group 20 mode active
end
interface GigabitEthernet4/0/13
description Netapp2-e0c
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 10,20,511,519
channel-protocol lacp
channel-group 20 mode active
end
interface GigabitEthernet6/0/12
description Netapp2-e0b
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 10,20,511,519
channel-protocol lacp
channel-group 20 mode active
end
interface GigabitEthernet6/0/13
description Netapp2-e0d
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 10,20,511,519
channel-protocol lacp
channel-group 20 mode active
end
interface Port-channel20
description Netapp2-NFS
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 10,20,511,519
spanning-tree portfast
spanning-tree bpduguard enable
end

Our problem was fixed by the storage people. They changed the server end to trunk, and the encapsulation / etherchannel.
I like all the suggestions, and they probably helped out with the configuration getting this to work.
Thanks!
interface Port-channel20
description Netapp2-NFS
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 10,20,511,519
switchport mode trunk
interface GigabitEthernet4/0/12
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 10,20,511,519
switchport mode trunk
channel-protocol lacp
channel-group 20 mode active
interface GigabitEthernet4/0/13
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 10,20,511,519
switchport mode trunk
channel-protocol lacp
channel-group 20 mode active
interface GigabitEthernet6/0/12
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 10,20,511,519
switchport mode trunk
channel-protocol lacp
channel-group 20 mode active
interface GigabitEthernet6/0/13
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 10,20,511,519
switchport mode trunk
channel-protocol lacp
channel-group 20 mode active

Stacking 3750s and Port Channel

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