adding another switch to a cisco catalyst 3500

[zeos]

A church asked us to add a switch to their cisco 3500 48 port, and my boss got another cisco 3500 24 port for them. i tested 24 port switch in the office by plugging the switch into our consumer grade 8 port switch and it worked. i was able browse the internet with a computer hooked up to the cisco 24 port via the cheapo switch. i have no experience with cisco switches and i assumed i could just use a patch cable like i did at the office. wrong, when i did this at the church the port on the existing 48 port switch was showing no connectivity, and neither was the the port on the 24 port we brought. i tried several different cables and different ports just to be sure it wasn't something physical.

is there a specific uplink port on these switches or some kind of mac filtering?

 

[imagoon]

3500 is 10/100 isn't it? You will need a crossover. I think (but could be very wrong) that you can turn on auto MDX on those but not sure. If auto crossover is there, it may be disabled by default since it is not always supported on 100mbps switches.

 

[airdata]

might need to specify the ports as trunk ports if they have previously been setup as access ports.

interface fa 0/1
switchport mode trunk

 

[imagoon]

might need to specify the ports as trunk ports if they have previously been setup as access ports.

interface fa 0/1
switchport mode trunk

You only need this if the switches are handling vlans however.

 

[zeos]

3500 is 10/100 isn't it? You will need a crossover. I think (but could be very wrong) that you can turn on auto MDX on those but not sure. If auto crossover is there, it may be disabled by default since it is not always supported on 100mbps switches.

when i tested in the office i used a regular patch cable so i don't think i need a crossover.

might need to specify the ports as trunk ports if they have previously been setup as access ports.

interface fa 0/1
switchport mode trunk

after some more goggleing i think you may be correct. does uplink have to be on port 1 or can set it up on any port?

edit: i found this http://www.webhostingtalk.com/showpost.php?p=3919460&postcount=11

en
conf t
int fa0/1
no spanning-tree portfast
speed 100
duplex full
end


and if i wanted port 46 would i change fa0/1 to fa0/46?

 

[drebo]

You will need to use a crossover cable. Especially if one of the switchess is a 3500XL switch (you don't specify what kind of 3500 switch and there are lots of them that all have different capabilities and compatibilities).

 

[imagoon]

when i tested in the office i used a regular patch cable so i don't think i need a crossover.

You may want to check your testing methodology, You tested with another switch in the office, not the one on the customer premises.

Again, unless you are using vlans, you do not need to trunk a port. Before you go off and start messing with the switch config, you may want to look up and see what a trunk port actually is.

http://en.wikipedia.org/wiki/Virtual_LAN

Trunks only have meaning when you implement and use 802.1Q.

after some more goggleing i think you may be correct. does uplink have to be on port 1 or can set it up on any port?

edit: i found this http://www.webhostingtalk.com/showpo...0&postcount=11

en
conf t
int fa0/1
no spanning-tree portfast
speed 100
duplex full
end


and if i wanted port 46 would i change fa0/1 to fa0/46?

You can choose any port you want. All you did there is turned off spanning tree (not a good idea when doing switch to switch), locked the speed to 100 and the mode to duplex. That is not a trunk port which is good because I seriously doubt you need it. Note that if you disable auto negotiate, you need to hard set the other port on the other switch as well. And likely will need a crossover, as you are using 100mbps gear that does not have auto MDX.

 

[zeos]

You may want to check your testing methodology, You tested with another switch in the office, not the one on the customer premises.

good point, i will double check the crossover possibility.

 

[spidey07]

Crossover isn't possibility. You MUST use one. They don't have auto-mdi.

 

[zeos]

the crossover fixed it, thank you for the help.