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Hello
I've Cisco 7206VXR (with NPE-G1) router connected to Catalyst switch
over copper 1000BaseT connection. Every time When I'm adding subinterface
at Gi0/1 the whole Gi0/1 went, eg:

conf t
int giga0/1.200

Then on switch:

%LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/1, changed state to down
%LINK-3-UPDOWN: Interface GigabitEthernet0/1, changed state to down
%LINK-3-UPDOWN: Interface GigabitEthernet0/1, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/1, changed state to up

Configuration:

7200:

interface GigabitEthernet0/1
no ip address
duplex full
speed 1000
media-type rj45
no negotiation auto
no cdp enable
no clns route-cache

3650G:

interface GigabitEthernet0/1
switchport trunk encapsulation dot1q
switchport mode trunk
load-interval 30
speed 1000
duplex full
no mdix auto
no cdp enable
end

7200 is running 12.2(25)S4, and the Catalyst is running 12.2(25)SED1.
The cabling is 100% OK. Any recommendations or advices ?

Earlier Giga0/1 was connected to other Catalyst over 1000BaseSX
(using SX GBIC at NPE-G1) connection - and earlier there was no problem...

Thanks,
RobertH

Hi,

This would be because of the Autostate feature of the Catalyst switch.
Just check the following link :

http://www.cisco.com/en/US/partner/p...80160b14.shtml

Bye
Hyder