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Multiple VLANs routing across trunks

dlhost
Level 1
Level 1

I have 2 switches, one is a Cisco 3750 and the other is a Cisco 2950.

I can ping the interface from each switch on each PC, and vice versa, but I cannot ping across the trunk port from PC to the other VLAN.  I am definetly a noob at this so any one that can spread some clear instructions on how to do this would be greatly appreciated.

Config for Cisco 3750:

Building configuration...

Current configuration : 2451 bytes
!
version 12.2
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname 3750Cisco
!
boot-start-marker
boot-end-marker
!
enable password XXXXXXX
!
no aaa new-model
switch 1 provision ws-c3750g-48ts
system mtu routing 1500
ip subnet-zero
ip routing
!
!
!
!
!
!
!
!
!
spanning-tree mode pvst
spanning-tree extend system-id
!
vlan internal allocation policy ascending
!
!
!
interface GigabitEthernet1/0/1
!
interface GigabitEthernet1/0/2
!
interface GigabitEthernet1/0/3
!
interface GigabitEthernet1/0/4
!
interface GigabitEthernet1/0/5
!
interface GigabitEthernet1/0/6
!
interface GigabitEthernet1/0/7
!
interface GigabitEthernet1/0/8
!
interface GigabitEthernet1/0/9
!
interface GigabitEthernet1/0/10
!
interface GigabitEthernet1/0/11
!
interface GigabitEthernet1/0/12
!
interface GigabitEthernet1/0/13
!
interface GigabitEthernet1/0/14
!
interface GigabitEthernet1/0/15
!
interface GigabitEthernet1/0/16
!
interface GigabitEthernet1/0/17
!
interface GigabitEthernet1/0/18
!
interface GigabitEthernet1/0/19
!
interface GigabitEthernet1/0/20
!
interface GigabitEthernet1/0/21
!
interface GigabitEthernet1/0/22
!
interface GigabitEthernet1/0/23
!
interface GigabitEthernet1/0/24
!
interface GigabitEthernet1/0/25
!
interface GigabitEthernet1/0/26
!
interface GigabitEthernet1/0/27
!
interface GigabitEthernet1/0/28
!
interface GigabitEthernet1/0/29
!
interface GigabitEthernet1/0/30
!
interface GigabitEthernet1/0/31
!
interface GigabitEthernet1/0/32
!
interface GigabitEthernet1/0/33
!
interface GigabitEthernet1/0/34
!
interface GigabitEthernet1/0/35
!
interface GigabitEthernet1/0/36
!
interface GigabitEthernet1/0/37
!
interface GigabitEthernet1/0/38
!
interface GigabitEthernet1/0/39
!
interface GigabitEthernet1/0/40
!
interface GigabitEthernet1/0/41
!
interface GigabitEthernet1/0/42
!
interface GigabitEthernet1/0/43
!
interface GigabitEthernet1/0/44
!
interface GigabitEthernet1/0/45
!
interface GigabitEthernet1/0/46
!
interface GigabitEthernet1/0/47
!
interface GigabitEthernet1/0/48
!
interface GigabitEthernet1/0/49
 switchport access vlan 49
 switchport mode access
!
interface GigabitEthernet1/0/50
!
interface GigabitEthernet1/0/51
!
interface GigabitEthernet1/0/52
!
interface Vlan1
 no ip address
!
interface Vlan49
 ip address 10.0.0.1 255.255.255.252
!
ip classless
ip http server
ip http secure-server
!
!
control-plane
!
!
line con 0
line vty 5 15
!
end

 

Config file for 2950:

Building configuration...

Current configuration : 1348 bytes
!
version 12.1
no service pad
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname Switch
!
!
ip subnet-zero
!
!
spanning-tree mode pvst
no spanning-tree optimize bpdu transmission
spanning-tree extend system-id
!
!
!
!
interface FastEthernet0/1
 switchport access vlan 91
 switchport trunk allowed vlan 1-99
 switchport mode trunk
!
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
!
interface FastEthernet0/23
!
interface FastEthernet0/24
 switchport access vlan 24
 switchport mode access
!
interface Vlan1
 no ip address
 no ip route-cache
 shutdown
!
interface Vlan24
 ip address 216.68.91.225 255.255.255.224
 no ip route-cache
!
ip default-gateway 216.68.91.226
ip http server
!
line con 0
line vty 0 4
 login
line vty 5 15
 login
!
!
end

2 Replies 2

chevymannie
Level 1
Level 1

By chance are you using the 2950 as the default gateway on the PC that's on VLAN 24?  I believe those are layer 2.  That's why you ping across. The 3750 is layer 3 so you'll need to configure vlan 24 on it and use it as your gateway on that VLAN.

Earl Granger IV
Level 1
Level 1

Is there a trunk between the 3750 and 2960?  If so, there should be a trunk between the 2960 and 3750. Also if you are trying to ping devices from the 2960 to the 3750 or visa versa then the switches need to be in the same subnet which they are not.  

HTH,

Ezy

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