ISP Handoff to 2950

[seth]

I have a 2950, the ISP we use gives us a Cat 5 cable with RJ45 connection.
I put it into a very basic configured 2950 and I cannot get to the internet.
I have a PIX 515E and RV320 that connect into this 2950.
They can talk to each other and build VPN Tunnels.
But going to the outside world, no go.

I can swap out the 2950 and put in a plain 5-port Linksys 10/100 switch and I get full connectivity.

So I thought perhaps the cable they were handing us was configured as a cross-over, so I bought another cross-over in line with it and still no go.

All ports are in VLAN 1

FA 0/1 (ISP is going to this port) is set to Speed 100 and Full Duplex.

So what am I missing?

should the port be configured with the switchport mode multi option?

[seth]

Is it the dot1q tagging that is causing the problem?

[seth]

Any thoughts?

This is the config on the switch

Current configuration : 2639 bytes

!

version 12.1

no service pad

service timestamps debug uptime

service timestamps log uptime

no service password-encryption

!

hostname Ext_Switch

!

enable secret 5 $1$/OQS$3l6YKOy7v.r16YAOoBWaX.

!

ip subnet-zero

!

vtp mode transparent

!

spanning-tree mode pvst

no spanning-tree optimize bpdu transmission

spanning-tree extend system-id

!

!

vlan 2-3,10

interface FastEthernet0/1

switchport access vlan 10

switchport mode trunk  <------I just added this, it was access mode before.

duplex full

speed 100

spanning-tree portfast

!

interface FastEthernet0/2

switchport access vlan 10

switchport mode access

duplex full

speed 100

spanning-tree portfast

!

interface FastEthernet0/3

switchport access vlan 10

switchport mode access

duplex full

speed 100

spanning-tree portfast

!

interface FastEthernet0/4

switchport access vlan 10

switchport mode access

duplex full

speed 100

spanning-tree portfast

!

interface FastEthernet0/5

switchport access vlan 10

switchport mode access

duplex full

speed 100

spanning-tree portfast

.......

!
**************Added this section this morning, have not tested yet******************************

interface Vlan1

ip address x.x.x.x 255.255.255.128

no ip route-cache

ip default-gateway x.x.x.x
*******************************************************************************************************

ip http server

!

!

line con 0

line vty 0 4

login

line vty 5 15

login

!

end

[glen.grant]

2950 does not have auto mdix so make sure if you are going other switches you use a crossover .  if the connection to the isp is 100 meg set the port as auto , ISP not likely to have hardcoded the port and this will cause a duplex mismatch . If you have all your ports in the same vlAN  then that should be functionally equivalent to a linksys switch  without mdix capabilty .  Unless you have a specific reason you shouldn't need any ports trunked .

[seth]

Ok, I will remove the speed settings and see what happens.

Regarding the cable, I Have tried using the cable they hand off to me directly to the switch and I have also tried putting a Cross Over cable in line.....no good either way.

[seth]

The hand off we get from our ISP comes out of a Cisco Catalyst 4948

Based on the config listed below, I tried the following this morning.

Plugged cable in to FA 0/1, port goes up, but no communication

Put a cross-over cable in line, the plugged into FA 0/1, port goes up, no communication.

Moved the cable to FA 0/3, did the same two things as listed above and the port goes up, no communication.

Did a Write Erase on the switch, then rebooted it.

With no config in place, I did the same things again as above.
Port goes up, speed 100, duplex full....no communication.

I do a sh mac-address-table
There is no MAC address listed for what is connected on FA 0/1
I have my PIX 515E connected on FA 0/2 and it shows a MAC address on that port.

So I have no idea what else to try at this point.
I don't get why a dumb Linksys switch works fine, but putting in a Cisco 2950 breaks it.

what else am I missing?

[devils_advocate]

When you do a 'show int fa0/1', does both the status and the line protocol show as up? 

interface FastEthernet0/1

switchport access vlan 10

switchport mode trunk  <------I just added this, it was access mode before.

duplex full

speed 100

spanning-tree portfast

At the moment you have configured the port to be a Trunk which has a Native Vlan of 1, the switchport acccess vlan 10 command is doing nothing.

You need to speak to the ISP and ask them how their side is configured, if its a 4948 as mentioned then they should be able to give you the configuration. 

You are connecting to them at Layer 2 so you need to know whether its an access or a trunk port. If its an access port, which Vlan is being used their end. If a trunk, ensure they are using the same native vlan you are.

[seth]

I tried their connection to me in both port FA 0/1 and port FA 0/3
The Trunk option I added in at a later time, it was not set that way initially.

See my post below.

Results are the same either way.

I have a call into my contact at the ISP, waiting him to call back...but being holiday weekend he may be off till next week.