10-24-2006 10:25 AM - edited 03-05-2019 12:25 PM
I have established the Etherchannel on the router using both FastEthernet ports, and assigned no ip address on the actual ports and assigned it to Po1. I then setup an EtherChannel on the switch using ports 1 and 3, again...nothing special. Ports 1 and 3 happen to belong to a VLAN...say vLAN 3 as well as port 5, which I have been using as a test port to ping the different interfaces. With no etherchannels setup I can ping the different ports fine...once I establish the etherchannel I can no longer ping the router ports, or ping from the router to the switch or the test node. But I can ping from the switch to the Node, and vice versa. So it appears to be something related to the Etherchannel on the router. Is there a systematic way to trouble shoot this issue, or anything I should look for that would prevent the router from working properly with EtherChannel?
Thanks,
Jason
10-25-2006 06:02 AM
I could use an answer on this as well. Does anyone have and ideas that they can share with us here? Thanks!
10-25-2006 07:58 PM
Jason,
Can you please explain your network ode clearly.
Where are all your vlans configured and where are you doing Inter-Vlan routing.
Why r u trying to configure ehterchannel between the router and switch.
Regards,
Suresh
10-25-2006 09:35 PM
Hey Jason,
It would be helpful if you post the configuration that you have on your switch and router. Moreover it would be better if you explain your network a little bit. It would be easier to help you that way.
Regards,
AbhisheK
10-26-2006 07:30 AM
The reason for the ehterchannel between the router and the switch is to provide more bandwidth and some sort of load balancing and redundancy. The initial part of the network is T3 into the 3725 router, which will connect up to a VLAN, where a firewall will also connect. That particular VLAN is setup on the 3560 switch, which you can see in the config files. That is the initial part of the network...where we are having troubles setting it up.
I have of course changed the IP addresses, but you can see them identified accordingly.
ROUTER CONFIG
!
version 12.3
service timestamps debug datetime msec
service timestamps log datetime msec
service password-encryption
service sequence-numbers
!
hostname routername
!
boot-start-marker
boot system flash c3725-ipbase-mz.123-17a.bin
boot-end-marker
!
card type t3 1
logging buffered 20000 debugging
no logging console
enable secret
!
clock timezone EST -5
clock summer-time EDT recurring
no aaa new-model
ip subnet-zero
no ip source-route
ip icmp rate-limit unreachable 100
ip cef
!
!
!
no ip bootp server
no ip domain lookup
!
controller T3 1/0
!
interface Port-channel1
ip address "IP Address 1A" 255.255.255.128
no ip redirects
no ip proxy-arp
hold-queue 0 in
!
interface FastEthernet0/0
description Internal 1
no ip address
speed 100
full-duplex
channel-group 1
!
interface FastEthernet0/1
no ip address
speed 100
full-duplex
channel-group 1
!
interface Serial1/0
(This shouldn't matter but if it does let me know, and I can provide some of the config)
!
ip default-gateway "IP Address 1B"
ip classless
no ip http server
!
SWITCH CONFIG
!
version 12.2
no service pad
service timestamps debug uptime
service timestamps log datetime
service password-encryption
service sequence-numbers
!
hostname switchname
!
enable secret
!
no aaa new-model
clock timezone UTC -5
clock summer-time UTC recurring
ip subnet-zero
no ip domain-lookup
ip domain-name domainname
!
!
mls qos
!
!
no file verify auto
spanning-tree mode pvst
spanning-tree extend system-id
!
vlan internal allocation policy ascending
!
interface Port-channel1
!
interface GigabitEthernet0/1
description RouterFE
switchport access vlan 2
switchport mode access
duplex full
speed 100
channel-group 1 mode active
!
interface GigabitEthernet0/2
description
switchport access vlan 2
switchport mode access
!
interface GigabitEthernet0/3
description RouterFE
switchport access vlan 2
switchport mode access
duplex full
speed 100
channel-group 1 mode active
!
interface GigabitEthernet0/4
description
switchport access vlan 2
switchport mode access
!
interface GigabitEthernet0/5
description TestPort
switchport access vlan 2
switchport mode access
duplex full
speed 1000
!
interface GigabitEthernet0/6
shutdown
(the rest of the ports are shut down but will be on vlan 1)
!
interface GigabitEthernet0/49
switchport trunk encapsulation dot1q
switchport mode trunk
macro description cisco-switch
auto qos voip trust
spanning-tree link-type point-to-point
!
interface GigabitEthernet0/50
switchport trunk encapsulation dot1q
switchport mode trunk
macro description cisco-switch
auto qos voip trust
spanning-tree link-type point-to-point
!
interface GigabitEthernet0/51
switchport trunk encapsulation dot1q
switchport mode trunk
macro description cisco-switch
auto qos voip trust
spanning-tree link-type point-to-point
!
interface GigabitEthernet0/52
switchport trunk encapsulation dot1q
switchport mode trunk
macro description cisco-switch
auto qos voip trust
spanning-tree link-type point-to-point
!
interface Vlan1
ip address "IP Address 1C" 255.255.255.0
no ip route-cache
!
interface Vlan2
no ip address "IP Address 2A"
no ip route-cache
!
ip default-gateway "IP Address 2C"
ip classless
ip http server
!
Hope this helps.
Thanks again!
Jason
10-26-2006 09:04 AM
Try setting the switch etherchannel mode to on instead of active.
10-26-2006 09:26 AM
We will try this on the switch. Does it make a difference what load-balance setting we use?
10-26-2006 11:08 AM
That is really up to you how to load balance and how the traffic is , you may have to play with that if you find all traffic is going down one link .
10-27-2006 12:47 AM
Jason,
What I think is having etherchannel between the router and switch is not that recommended.
Supose if you configure etherchannel on switch the bandwidth becomes 200Mbps but when on the router you are connected with T3 link. So, that may cause congestion on your router.
You can also connect your devices in this order if you want. From your router connect to Firewall and from there you connect to switch. So you firewall will do all the access control functions. And if your firewall has extra port then you can connect both interfaces of your firewall to interfaces of router and do load balancing between the two ports on firewall.
HTH
Regards,
Suresh
10-27-2006 08:42 AM
Etherchannel involves the user of more than one fastEthernet/GIGE port. You don't configure to a setrial interface on the router.
If you have 2 Ethernet interfaces and you want to aggregate their bandwidth to make a single logical link, then you configure them both for etherchannel.
10-26-2006 01:34 PM
Perform the show portchannel and sh etherchannel commands to determine if yuo have it set up. the other thing to look at is how you set up the Trunk- Did you set it to something other than ON? If you use ON, use AUTO or ON on the other end. If you use auto, you must turn trunking ON on one end, otherwise etherchannel will not come up, as the "auto" command will negotiate only if asked to become a trunk by a designated trunk port. Its that easy...
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide