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VLANs with 2950 switches

Hi,

I've been setting up a second vlan on my 2950 switches and i have some questions about the nature of communication between switches that have the same vlans. I have one switch that has two vlans:

1 default 2 vlan2

I have another switch with the same configuration and these switches are connected via a gigabit fiber cross connect.

These two can communicate back and forth between each other on both vlans no problem. I'm not referring to communication btwn the vlans just each vlan can communicate within it's own IP segment (192.168.25.x & 192.168.28.x)

If I take a third 2950 switch and create a second vlan (2 vlan2) and connect to one of these two switches via a cross-over cable, vlan1 is fine no problems, but any machine connected to vlan2 can't communicate with a machine connected to vlan2 on any of the other switches.

I can't seem to figure why this third switch isn't working like the other two?

all three switches are in Server VTP operating mode.

I'm fairly new to all this, so thank you for your patience. If there's more pertinent information i need to supply please tell me.

TIA, cb

Reply to
cb
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Thanks TP for your reply.

Here are the three running configs from all 3 switches.

****Switch 1**** Building configuration...

Current configuration : 2381 bytes ! version 12.1 no service pad service timestamps debug uptime service timestamps log datetime no service password-encryption service sequence-numbers ! hostname NYSwitch1 ! enable secret 5 $1$WFoj$vc6dMm1s5T0qb00UUVjkk0 enable password xxxxx ! ip subnet-zero cluster enable istarsw 0 cluster member 1 mac-address 000d.2857.f800 cluster member 2 mac-address 000d.ed3f.9b40 cluster member 3 mac-address 000e.3843.0780 cluster member 4 mac-address 0011.5c24.5cc0 cluster member 6 mac-address 0011.5ce8.0800 ! spanning-tree mode pvst no spanning-tree optimize bpdu transmission spanning-tree extend system-id ! ! interface FastEthernet0/1 no ip address duplex full speed 100 ! interface FastEthernet0/2 no ip address duplex full speed 100 ! interface FastEthernet0/3 no ip address duplex full speed 10 ! interface FastEthernet0/4 no ip address ! interface FastEthernet0/5 no ip address ! interface FastEthernet0/6 no ip address ! interface FastEthernet0/7 no ip address ! interface FastEthernet0/8 no ip address ! interface FastEthernet0/9 no ip address ! interface FastEthernet0/10 no ip address ! interface FastEthernet0/11 no ip address ! interface FastEthernet0/12 no ip address duplex full speed 100 ! interface FastEthernet0/13 no ip address ! interface FastEthernet0/14 no ip address ! interface FastEthernet0/15 no ip address ! interface FastEthernet0/16 no ip address duplex full speed 100 ! interface FastEthernet0/17 no ip address ! interface FastEthernet0/18 no ip address ! interface FastEthernet0/19 no ip address ! interface FastEthernet0/20 no ip address ! interface FastEthernet0/21 switchport access vlan 2 no ip address ! interface FastEthernet0/22 switchport access vlan 2 no ip address ! interface FastEthernet0/23 no ip address ! interface FastEthernet0/24 no ip address ! interface GigabitEthernet0/1 no ip address ! interface GigabitEthernet0/2 no ip address ! interface Vlan1 ip address 192.168.25.240 255.255.255.0 no ip route-cache ! ip default-gateway 192.168.25.1 ip http server ! ip access-list extended CMP-NAT-ACL dynamic Cluster-HSRP deny ip any any dynamic Cluster-NAT permit ip any any ! snmp-server community VRTest RO snmp-server community VRTest@es0 RO snmp-server location MDF snmp-server contact Chris Beach ! line con 0 line vty 0 4 password xxxxx login line vty 5 15 password xxxxx login ! end

****Switch 2**** Building configuration...

Current configuration : 2100 bytes ! version 12.1 no service pad service timestamps debug uptime service timestamps log uptime no service password-encryption ! hostname NYSwitch2 ! enable secret 5 $1$WFoj$vc6dMm1s5T0qb00UUVjkk0 ! ip subnet-zero ! cluster commander-address 000d.2857.f0c0 member 1 name istarsw spanning-tree mode pvst no spanning-tree optimize bpdu transmission spanning-tree extend system-id ! ! interface FastEthernet0/1 no ip address ! interface FastEthernet0/2 no ip address ! interface FastEthernet0/3 no ip address ! interface FastEthernet0/4 no ip address ! interface FastEthernet0/5 no ip address ! interface FastEthernet0/6 no ip address ! interface FastEthernet0/7 no ip address ! interface FastEthernet0/8 no ip address ! interface FastEthernet0/9 no ip address ! interface FastEthernet0/10 switchport access vlan 2 no ip address ! interface FastEthernet0/11 switchport access vlan 2 no ip address ! interface FastEthernet0/12 switchport access vlan 2 no ip address ! interface FastEthernet0/13 switchport access vlan 2 no ip address ! interface FastEthernet0/14 switchport access vlan 2 no ip address ! interface FastEthernet0/15 switchport access vlan 2 no ip address ! interface FastEthernet0/16 switchport access vlan 2 no ip address duplex full speed 10 ! interface FastEthernet0/17 no ip address ! interface FastEthernet0/18 no ip address ! interface FastEthernet0/19 no ip address ! interface FastEthernet0/20 no ip address ! interface FastEthernet0/21 no ip address ! interface FastEthernet0/22 no ip address ! interface FastEthernet0/23 no ip address ! interface FastEthernet0/24 no ip address ! interface GigabitEthernet0/1 no ip address ! interface GigabitEthernet0/2 no ip address ! interface Vlan1 ip address 192.168.25.241 255.255.255.0 no ip route-cache ! ip default-gateway 192.168.25.1 ip http server ! snmp-server community VRTest RO snmp-server community $15tar$ RO snmp-server community VRTest@es1 RO snmp-server location IDF snmp-server contact Chris Beach ! line con 0 line vty 0 4 password xxxxx login line vty 5 15 password xxxxx login ! end

****Switch 3**** Building configuration...

Current configuration : 1309 bytes ! version 12.1 no service pad service timestamps debug uptime service timestamps log uptime no service password-encryption ! hostname NYSwitch8 ! enable secret 5 $1$JMtm$/dwTsRQNVduawQtjq2SDG/ enable password xxxxx ! ip subnet-zero ! ! spanning-tree mode pvst no spanning-tree optimize bpdu transmission spanning-tree extend system-id ! ! ! ! interface FastEthernet0/1 ! interface FastEthernet0/2 ! interface FastEthernet0/3 ! interface FastEthernet0/4 ! interface FastEthernet0/5 ! interface FastEthernet0/6 ! interface FastEthernet0/7 ! interface FastEthernet0/8 ! interface FastEthernet0/9 ! interface FastEthernet0/10 ! interface FastEthernet0/11 ! interface FastEthernet0/12 ! interface FastEthernet0/13 ! interface FastEthernet0/14 ! interface FastEthernet0/15 ! interface FastEthernet0/16 ! interface FastEthernet0/17 ! interface FastEthernet0/18 ! interface FastEthernet0/19 ! interface FastEthernet0/20 ! interface FastEthernet0/21 ! interface FastEthernet0/22 switchport access vlan 2 ! interface FastEthernet0/23 ! interface FastEthernet0/24 ! interface Vlan1 ip address 192.168.25.247 255.255.255.0 no ip route-cache ! ip default-gateway 192.168.25.1 ip http server snmp-server community !istar! RO ! line con 0 line vty 0 4 password xxxxx login line vty 5 15 password xxxxx login ! ! end

Reply to
cb

W artykule cb napisa³(a):

Please show us the configuration ot this third switch (sh ru).

TP

Reply to
Tomasz Paszkowski

Thanks again for your reply TP.

I ended up creating another vlan all together and everything works fine now. I don't know what the problem was with the second vlan, but I couldn't find anything particular about it that was mis-configured. I now have vlan3 and it all works, no issues.

I wish I knew what was wrong with vlan2 only because whatever happened maybe could happen again to vlan3, but maybe not?

Thanks again for your help.

cb

Reply to
cb

W artykule cb napisa³(a):

What are the ports connecting switch2 with switch3 ?

TP

Reply to
Tomasz Paszkowski

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