EASY CISCO: can't connect from/to remote subnet, even though ip default-gateway set correctly.

I am completely stuck here.

We have a Catalyst 4506 with SupII+ running IOS 12.1(20r)EW1

I have set the ip default-gateway correctly, but cannot ping anything off the local subnet. What have i done wrong?

included below, running config and ping results.

the toplogy is :

this switch --- dist2 --- corerouter

The unit can connect to another lan if i enable a vlan interface, and assign an IP in the correct range, but it again won't pass anything through the gateway.


I have checked the gateway config, and it seems fine - we have other switches using it, and working ok.

I'm sure it's something silly i have missed.

Any pointers would be hugely appreciated.

W

#sh run
 
Building configuration...
 
Current configuration : 8655 bytes
!
version 12.2
no service pad
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
service compress-config
!
hostname XXXX_4506
!
boot-start-marker
boot-end-marker
!
enable secret 5 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx/
!
no aaa new-model
clock summer-time UTC recurring last Sun Mar 1:00 last Sun Oct 2:00
ip subnet-zero
no ip domain-lookup
!
cluster run
!
!
!
power redundancy-mode redundant
!
!
spanning-tree mode pvst
spanning-tree extend system-id
!
vlan internal allocation policy ascending
!
interface GigabitEthernet1/1
 switchport trunk encapsulation dot1q
 switchport mode trunk
!
interface GigabitEthernet1/2
!
interface FastEthernet2/1
!
interface FastEthernet2/2
!
....
!
interface FastEthernet6/48
!
interface Vlan1
 no ip address
 no ip route-cache cef
 no ip route-cache
 shutdown
!
interface Vlan345
 description MANAGEMENT
 ip address 172.16.254.120 255.255.254.0
!
ip default-gateway 172.16.254.1
no ip http server
no ip http secure-server
!
!
!
!
control-plane
!
!
line con 0
 stopbits 1
line vty 0 4
 exec-timeout 720 0
 password XXXXXXX
 login
line vty 5 15
 no login
!
ntp server 10.10.0.1
end
 
XXXXX_4506#ping 172.16.254.1
 
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.16.254.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms
XXXXX_4506#ping 172.16.254.120
 
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.16.254.120, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/1 ms
XXXXX_4506#ping 172.16.20.1
 
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.16.20.1, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
XXXXX_4506#ping 10.10.10.1
 
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.10.10.1, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
XXXXX_4506#
 
 
XXXX_4506#sh ver
Cisco IOS Software, Catalyst 4500 L3 Switch Software (cat4500-IPBASEK9-M), Version 12.2(40)SG, RELEASE SOFTWARE (fc2)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2007 by Cisco Systems, Inc.
Compiled Wed 07-Nov-07 18:51 by prod_rel_team
Image text-base: 0x10000000, data-base: 0x117EBBE8
 
ROM: 12.1(20r)EW1
Dagobah Revision 95, Swamp Revision 3
 
XXXX_4506 uptime is 22 minutes
System returned to ROM by reload
System image file is "bootflash:"
 
cisco WS-C4506 (MPC8245) processor (revision 4) with 262144K bytes of memory.
Processor board ID 
MPC8245 CPU at 266Mhz, Supervisor II+
Last reset from Reload
2 Virtual Ethernet interfaces
240 FastEthernet interfaces
2 Gigabit Ethernet interfaces
511K bytes of non-volatile configuration memory.
 
Configuration register is 0x2101
 
 
XXXX_4506#sh int statu | inc Gi
Gi1/1                        connected    trunk        full   1000 1000BaseSX
Gi1/2                        notconnect   1            full   1000 1000BaseSX

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