RE: peculier high input errors on Cisco 4507 on etherchannel

Whens the last time you cleared the counters? (IE, what's the time frame
on the input errors?)

thanks,
Brad Ellis
CCIE#5796 (R&S / Security)
CCSI# 30482
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-----Original Message-----
From: nobody_at_groupstudy.com [mailto:nobody_at_groupstudy.com] On Behalf Of
subodh.rawat_at_wipro.com
Sent: Saturday, October 02, 2010 4:49 AM
To: ccielab_at_groupstudy.com
Subject: peculier high input errors on Cisco 4507 on etherchannel with
cisco 6509

Hi All,

We are having some peculiar problem.

We have two switches (Cisco 6509 as L3 and Cisco 4507 as L2) and L2
ether-channel is formed between two switches with direct Cat6 cables
(without
any patch panel ports).

When I see show interface output, I dont see any errors on 6509 switch
port
while high input errors are observed on 4507 switch ports.

Below is show interface output and can see high input errors on 4507 and
no
errors on 6509-

BRA-4507R-Access-3#sh int po 8 | in error
     741322 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 output errors, 0 collisions, 0 interface resets

BRA-6509-Core-1#sh int po 32 | in error
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 output errors, 0 collisions, 0 interface resets

------------------------------------

My configuration on both the switches is as below -
A) Core Switch (6509) -

interface Port-channel32
 description ** Etherchannel#32, Gi3/2+Gi3/10+Gi7/2+Gi7/10 to
BRA-Access-3,
Etherchannel#8, Gi6/1+Gi6/2+Gi7/1+Gi7/2 **
 switchport
 switchport trunk encapsulation dot1q
 switchport trunk allowed vlan 12,13,16-19,25,26,30
 switchport mode trunk
 no ip address
end
!
interface GigabitEthernet3/2
 description ** Etherchannel#32, to BRA-Access-3, Etherchannel#8 **
 switchport
 switchport trunk allowed vlan 12,13,16-19,25,26,30
 switchport mode trunk
 no ip address
 channel-group 32 mode on
end
BRA-6509-Core-1#sh run int g3/10
Building configuration...
Current configuration : 233 bytes
!
interface GigabitEthernet3/10
 description ** Etherchannel#32, to BRA-Access-3, Etherchannel#8 **
 switchport
 switchport trunk allowed vlan 12,13,16-19,25,26,30
 switchport mode trunk
 no ip address
 channel-group 32 mode on
end
BRA-6509-Core-1#sh run int g7/2
Building configuration...
Current configuration : 232 bytes
!
interface GigabitEthernet7/2
 description ** Etherchannel#32, to BRA-Access-3, Etherchannel#8 **
 switchport
 switchport trunk allowed vlan 12,13,16-19,25,26,30
 switchport mode trunk
 no ip address
 channel-group 32 mode on
end
BRA-6509-Core-1#sh run int g7/10
Building configuration...
Current configuration : 233 bytes
!
interface GigabitEthernet7/10
 description ** Etherchannel#32, to BRA-Access-3, Etherchannel#8 **
 switchport
 switchport trunk allowed vlan 12,13,16-19,25,26,30
 switchport mode trunk
 no ip address
 channel-group 32 mode on
end

B) Accesss Switch (4507) -

BRA-4507R-Access-3#sh run int po8
Building configuration...
Current configuration : 273 bytes
!
interface Port-channel8
 description ** Etherchannel#8, Gi6/1+Gi6/2+Gi7/1+Gi7/2 to BRA-Core-1,
Etherchan
nel#32, Gi3/2+Gi3/10+Gi7/2+Gi7/10 **
 switchport
 switchport trunk encapsulation dot1q
 switchport trunk allowed vlan 12,13,16-19,25,26,30
 switchport mode trunk
end
BRA-4507R-Access-3#sh run int g6/1
Building configuration...
Current configuration : 240 bytes
!
interface GigabitEthernet6/1
 description ** Etherchannel#8, to BRA-Core-1, Etherchannel#32 **
 switchport trunk encapsulation dot1q
 switchport trunk allowed vlan 12,13,16-19,25,26,30
 switchport mode trunk
 channel-group 8 mode on
end
BRA-4507R-Access-3#sh run int g6/2
Building configuration...
Current configuration : 240 bytes
!
interface GigabitEthernet6/2
 description ** Etherchannel#8, to BRA-Core-1, Etherchannel#32 **
 switchport trunk encapsulation dot1q
 switchport trunk allowed vlan 12,13,16-19,25,26,30
 switchport mode trunk
 channel-group 8 mode on
end
BRA-4507R-Access-3#sh run int g7/1
Building configuration...
Current configuration : 240 bytes
!
interface GigabitEthernet7/1
 description ** Etherchannel#8, to BRA-Core-1, Etherchannel#32 **
 switchport trunk encapsulation dot1q
 switchport trunk allowed vlan 12,13,16-19,25,26,30
 switchport mode trunk
 channel-group 8 mode on
end
BRA-4507R-Access-3#sh run int g7/2
Building configuration...
Current configuration : 240 bytes
!
interface GigabitEthernet7/2
 description ** Etherchannel#8, to BRA-Core-1, Etherchannel#32 **
 switchport trunk encapsulation dot1q
 switchport trunk allowed vlan 12,13,16-19,25,26,30
 switchport mode trunk
 channel-group 8 mode on
end

-------------------------

Total 4 Cat 6 cables are directly connected between these two switches
and all
ports are up with 1000/Full duplex.

The same problem is coming on other etherchannels as well between Core
switch
and Access switch. However there is no errors between directly connected
Access Switches (4507) ether channel.

Please help me in understanding this issue.

Regards,
Subodh Rawat |

Wipro Limited (Company Regn No in UK FC 019088)
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Received on Sat Oct 02 2010 - 06:33:54 ART