Etherchannel Between 2821 Rtr and 3750 12s

[merryllem]

Greetings,

Does anyone have experience configuring etherchannel Between 2821 Rtr and 3750 12S switch? Is this possible? Any links to cisco docs would be helpfull

Thank you

[Joseph W. Doherty]

http://www.cisco.com/en/US/prod/collateral/routers/ps5855/prod_white_paper0900aecd806f698a.pdf

[merryllem]

Thanks,

Now that my Etherchannel up, I still have one problem... I cant ping :(

Thanks,

Now that my Etherchannel up, I still have one problem... I cant ping :(

Rtr OUTPUT

show ip int brief

Interface IP-Address OK? Method Status Protocol

GigabitEthernet0/0 unassigned YES TFTP up up

GigabitEthernet0/1 unassigned YES TFTP up up

Port-channel1 1.1.1.1 YES manual up up

Int Configs

interface GigabitEthernet0/0

no ip address

load-interval 30

duplex auto

speed auto

channel-group 1

interface GigabitEthernet0/1

no ip address

load-interval 30

duplex auto

speed auto

channel-group 1

interface Port-channel1

ip address 1.1.1.1 255.255.255.252

show arp

Protocol Address Age (min) Hardware Addr Type Interface

Internet 1.1.1.1 - 0023.5ef0.3dc0 ARPA Port-channel1

Internet 1.1.1.2 0 Incomplete ARPA

SW OUTPUT

SHow etherchannel sum

Group Port-channel Protocol Ports

------+-------------+-----------+-----------------------------------------------

1 Po1(SU) - Gi1/0/12(P) Gi2/0/12(P)

Show int status

Gi1/0/12 connected 30 a-full a-1000 10/100/1000BaseTX SFP

Gi2/0/12 connected 30 a-full a-1000 10/100/1000BaseTX SFP

Po1 connected 30 a-full a-1000

Show ip int brief

Vlan30 14.13.0.46 YES TFTP up up

INT configs

interface GigabitEthernet1/0/12

switchport access vlan 30

switchport mode access

channel-group 1 mode on

interface GigabitEthernet2/0/12

switchport access vlan 30

switchport mode access

channel-group 1 mode on

interface Port-channel1

switchport access vlan 30

switchport mode access

spanning-tree portfast

interface Vlan30

ip address 1.1.1.2 255.255.255.252

no ip redirects

no ip proxy-arp

ip ospf message-digest-key 1 md5 7 123456

Show ARP

Protocol Address Age (min) Hardware Addr Type Interface

Internet 1.1.1.1 5 0023.5ef0.3dc0 ARPA Vlan30

Internet 1.1.1.2 - 0023.eac4.de44 ARPA Vlan30

One thing I notice is the ARP outputs. It seems that the router is not getting arp replies. while the sw is completing ARP process.

Thanks

[OTHMAN KOUDY]

We solved this issue by upgrading IOS from 124-3 to 124-25g. The URL that Joseph posted was very helpful

Thanks,

[Richard Burts]

Thanks for letting us know that you got it to work by changing versions. In the link that was posted it shows that 12.4(3) is too early a version to support EtherChannel.

I agree that the link Joseph posted is quite helpful and do not understand why someone gave it 2 stars. I think it deserves +5.

HTH

Rick