CSS Gig/Cu port to Cat4k FastEthernet

[mmedwid]

In our lab I'm trying to get a CSS11503 with Gig over coper ports (SCM-2GE) to talk to a cat 4k fast ethernet port via cat5 straight-through. But no luck. Do those ports speak only with other Gig over copper switch ports? Or is there a way to get it to talk to the cat4k's fastethernet ports? Thanks.

Here is the output from phy? Notice that the 100 Mbits settings are only allowed for 10/100 ports. Also the AUTO setting will not work for these Gig over copper ports.

CSS11503(config-if[ 1/1])# phy ?

100Mbits-FD 10/100 ports only. Set to 100 Mbits/s, Full-Duplex

100Mbits-HD 10/100 ports only. Set to 100 Mbits/s, Half-Duplex

10Mbits-FD 10/100 ports only. Set to 10 Mbits/s, Full-Duplex

10Mbits-HD 10/100 ports only. Set to 10 Mbits/s, Half-Duplex

1Gbits-FD-asym Gigabit ports only. Set to Full duplex with asymmetric

pause toward link partner

1Gbits-FD-no-pause Gigabit ports only. Set to Full duplex with no pause

1Gbits-FD-sym Gigabit ports only. Set to Full duplex with symmetric

pause

1Gbits-FD-sym-asym Gigabit ports only. Set to Full duplex with symmetric and

asymmetric pause toward local device

auto-negotiate Allow the interface to auto-negotiate speed and duplex

mode.

CSS11503(config-if[ 1/1])# phy auto

%% That syntax is only for 10/100 interfaces

[carenas123]

Upgrade ROMMON-Version of Supervisor to the latest available.

[r.docuyanan]

Hi Carenas,

When you say " our lab I'm trying to get a CSS11503 with Gig over coper ports (SCM-2GE) to talk to a cat 4k fast ethernet port via cat5 straight-through"

Take note that the CSS is considered a switch, so you connect to a cat4k is also a swith, you need a cross-over cable.

Just try, hope it solves

[mmedwid]

Thanks. But no - I had already tried a cross-over cable and this did not solve the issue. I eventually located a GigE blade for the Cat4k and *that* is the issue. The gig ports on a CSS are (surprisingly) not compatible with Fast Ethernet ports. I say surprisingly as every workstation I've bought for the last 3-4 years that has had a 10/100/1000 card as worked fine with fast ethernet. Seems like Cisco went out of its way to make CSS Gig ports not compatible. Maybe to force upgrading! Can't figure WHY they would select an interface incompatible with Fast Ethernet. Maybe their marketing team was in on that as a way to spur cheap customers to more expensive switches.

BTW - it was a straight-through cable from the CSS to the Gig port on the Catalyst that brought link light.