Etherchannel 1

[Jasonlees]

Hi Guys,

I am having a few issues with a cross stack ether-channel. Once connecting the cables, 1 side is up but the second side is showing as down. I switched the cables and am experiencing the same issues. What is the best way to fix this/troubleshoot?

Thanks everyone,

Jason

 

[burtsbees]

What cables are you using?
Post a sh run of each switch and a sh int of noth the physical interfaces and the etherchannel.

/

tim@tim-laptop ~ $ sudo apt-get install windows
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Couldn't find package windows...Thank Goodness!

 

[Jasonlees]

I am using 2 stackwise cables. Here is the running config I am using currently:

Current configuration : 4690 bytes
!
version 12.2
no service pad
service timestamps debug uptime
service timestamps log uptime
service password-encryption
!
hostname switch1
!
enable secret 5 $1$h/0s$5kmYYsEmNy/MEkMYchlia1
!
no aaa new-model
switch 1 provision ws-c3750g-24t
switch 3 provision ws-c3750g-24ts
system mtu routing 1500
ip subnet-zero
no ip domain-lookup
!
!
!
!
!
!
no file verify auto
spanning-tree mode pvst
spanning-tree extend system-id
!
vlan internal allocation policy ascending
!
!
interface Port-channel1
switchport access vlan 100
switchport access vlan 200
switchport mode access
switchport nonegotiate
flowcontrol receive on
spanning-tree portfast
spanning-tree guard loop
!
interface GigabitEthernet1/0/1
switchport access vlan 100
speed 1000
duplex full
spanning-tree portfast
!
interface GigabitEthernet1/0/2
switchport access vlan 100
speed 1000
duplex full
spanning-tree portfast
!
interface GigabitEthernet1/0/3
switchport access vlan 100
speed 1000
duplex full
spanning-tree portfast
!
interface GigabitEthernet1/0/4
switchport access vlan 100
speed 1000
duplex full
spanning-tree portfast
!
interface GigabitEthernet1/0/5
switchport access vlan 100
speed 1000
duplex full
spanning-tree portfast
!
interface GigabitEthernet1/0/6
switchport access vlan 100
speed 1000
duplex full
spanning-tree portfast
!
interface GigabitEthernet1/0/7
switchport access vlan 100
speed 1000
duplex full
spanning-tree portfast
!
interface GigabitEthernet1/0/8
switchport access vlan 100
speed 1000
duplex full
spanning-tree portfast
!
interface GigabitEthernet1/0/9
switchport access vlan 100
speed 1000
duplex full
spanning-tree portfast
!
interface GigabitEthernet1/0/10
switchport access vlan 100
speed 1000
duplex full
spanning-tree portfast
!
interface GigabitEthernet1/0/11
switchport access vlan 100
speed 1000
duplex full
spanning-tree portfast
!
interface GigabitEthernet1/0/12
switchport access vlan 100
speed 1000
duplex full
spanning-tree portfast
!
interface GigabitEthernet1/0/13
switchport access vlan 100
speed 1000
duplex full
spanning-tree portfast
!
interface GigabitEthernet1/0/14
switchport access vlan 100
speed 1000
duplex full
spanning-tree portfast
!
interface GigabitEthernet1/0/15
switchport access vlan 100
speed 1000
duplex full
spanning-tree portfast
!
interface GigabitEthernet1/0/16
switchport access vlan 200
speed 1000
duplex full
spanning-tree portfast
!
interface GigabitEthernet1/0/17
switchport access vlan 200
speed 1000
duplex full
spanning-tree portfast
!
interface GigabitEthernet1/0/18
switchport access vlan 200
speed 1000
duplex full
spanning-tree portfast
!
interface GigabitEthernet1/0/19
switchport access vlan 200
speed 1000
duplex full
spanning-tree portfast
!
interface GigabitEthernet1/0/20
switchport access vlan 200
speed 1000
duplex full
spanning-tree portfast
!
interface GigabitEthernet1/0/21
switchport access vlan 200
speed 1000
duplex full
spanning-tree portfast
!
interface GigabitEthernet1/0/22
switchport access vlan 200
speed 1000
duplex full
spanning-tree portfast
!
interface GigabitEthernet1/0/23
switchport trunk encapsulation dot1q
switchport mode trunk
channel-group 1 mode on
!
interface GigabitEthernet1/0/24
switchport trunk encapsulation dot1q
switchport mode trunk
channel-group 1 mode on
!
interface GigabitEthernet3/0/1
!
interface GigabitEthernet3/0/2
!
interface GigabitEthernet3/0/3
!
interface GigabitEthernet3/0/4
!
interface GigabitEthernet3/0/5
!
interface GigabitEthernet3/0/6
!
interface GigabitEthernet3/0/7
!
interface GigabitEthernet3/0/8
!
interface GigabitEthernet3/0/9
!
interface GigabitEthernet3/0/10
!
interface GigabitEthernet3/0/11
!
interface GigabitEthernet3/0/12
!
interface GigabitEthernet3/0/13
!
interface GigabitEthernet3/0/14
!
interface GigabitEthernet3/0/15
!
interface GigabitEthernet3/0/16
!
interface GigabitEthernet3/0/17
!
interface GigabitEthernet3/0/18
!
interface GigabitEthernet3/0/19
!
interface GigabitEthernet3/0/20
!
interface GigabitEthernet3/0/21
!
interface GigabitEthernet3/0/22
!
interface GigabitEthernet3/0/23
!
interface GigabitEthernet3/0/24
!
interface GigabitEthernet3/0/25
!
interface GigabitEthernet3/0/26
!
interface GigabitEthernet3/0/27
!
interface GigabitEthernet3/0/28
!
interface Vlan1
no ip address
shutdown
!
interface Vlan100
description LB
ip address 10.140.5.2 255.255.255.0
no ip route-cache
no ip mroute-cache

interface vlan200
ip address 10.140.10.2 255.255.255.0
no ip route-cache
no ip mroute-cache
!
ip default-gateway 10.140.5.1
ip classless
ip http server
ip http secure-server
!
!
!
control-plane
!
!
line con 0
password 7 095F4B0A0B0003525D5B293F3830083D32
line vty 0 4
password 7 040D5C2B1A32586E071E
login
line vty 5 15
password 7 0215015819031B611A19240C160332050B
login
!
end


Here is the output of the stackwise cables:

switch1#sh switch stack-ports
Switch # Port 1 Port 2
-------- ------ ------
1 Down Ok
3 Ok Down


Thanks

 

[unclerico]

your port-channel config isn't even close to what is configured on the physical interfaces.
1) shut down the physical interfaces (g1/0/23 - 24)
2) remove all configuration from these interfaces
3) remove the port-channel interface
4) go back under the interfaces (g1/0/23 - 24) and issue channel-group 1 mode on. this will create the new po1 interface
5) go under the po1 interface and enter all of your coniguration.
6) go back under the physical interfaces (g1/0/23 - 24) and issue no shut

obviously, make sure that the other side is configured exactly the same way.

I hate all Uppercase... I don't want my groups to seem angry at me all the time! =)
- ColdFlame (vbscript forum)

 

[Jasonlees]

Ok, seems to be working. On a separate note, do you know a command to where i can check the speeds of the cross stack etherchannel?

 

[Jasonlees]

Nevermind its sh switch stack-ring activity

 

[burtsbees]

Stars?

/

tim@tim-laptop ~ $ sudo apt-get install windows
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Couldn't find package windows...Thank Goodness!

 

[vipergg]

sh switch stack-ring activity has nothing to do with the etherchannel connectivity . That just shows the stack ring utilization across the stack cables .

 

[Jasonlees]

Ok, thanks; I am still learning this, if I set up a cross stack etherchannel; what purpose does the trunk on ports 23 an 24 do? Does this need to be configured?

 

[unclerico]

what is the purpose of the trunk on 23 and 24?? trunks are used for passing multiple VLANs across switches and into a layer 3 device such as a traditional router, a multilayer switch, or a firewall (or no layer 3 device if you don't want inter-VLAN comms). the config doesn't HAVE to go on ports 23 and 24, it can go on any port or ports that you want it to.

I hate all Uppercase... I don't want my groups to seem angry at me all the time! =)
- ColdFlame (vbscript forum)