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InterVLAN routing and Default Gateway issues

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Hi Fellow Techies,

I've been trying to tackle this problem for 2 weeks or so and it has become irritating finally I thought i should get your thoughts on this problem. What am i missing ?

This is part of my homelab infrastructure.

InterVLAN routing is working flawlessly, meaning i can ping all vlans and its hosts.The problem is that i can't reach the router 192.168.1.254 from any of my VLANs, though i can reach 192.168.1.1 which is the routed interface (Fe 0/15) on Layer 3 switch.Furthermore i can reach 192.168.1.254 from the layer 3 switch but not from the VLANs

Here is the config from 3550 L3 switch

isis#sho run
Building configuration...

Current configuration : 5711 bytes
!
version 12.1
no service pad

!
hostname isis
!
!
ip subnet-zero
ip routing
!
no ip domain-lookup
!
spanning-tree mode pvst
spanning-tree extend system-id
!
!
interface FastEthernet0/15
 description To Internet
 no switchport
 ip address 192.168.1.100 255.255.255.0

!Interfaces 0/17 to 0/32 belongs to VLAN 20
!link to saber 
interface FastEthernet0/17
 switchport access vlan 20
 switchport mode access
 no ip address
 
 
!link to pegasus
interface FastEthernet0/18
 switchport access vlan 20
 switchport mode access
 no ip address
 
 
 
!link to icarus
interface FastEthernet0/19
 switchport access vlan 20
 switchport mode access
 no ip address
 

!Interfaces 0/34 to 0/48 belongs to VLAN 10
!link to deadalus
interface FastEthernet0/34
 switchport access vlan 10
 switchport mode access
 no ip address
!

interface Vlan1
 no ip address
!
interface Vlan10
 ip address 10.10.10.1 255.255.255.0
!
interface Vlan20
 ip address 10.20.20.1 255.255.255.0
!
ip default-gateway 192.168.1.100
ip classless
ip route 0.0.0.0 0.0.0.0 192.168.1.254
ip http server
!
!
alias exec c conf t
alias exec s sho ip int br
!
end

Pings From Layer3

isis#ping 192.168.1.254

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.1.254, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms

isis#ping 192.168.1.100

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.1.100, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/3/4 ms

isis#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 100 percent (5/5), round-trip min/avg/max = 1/1/1 ms

isis#ping 10.10.10.2

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.10.10.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/4 ms

isis#ping 10.20.20.1

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.20.20.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/4 ms

isis#ping 10.20.20.2

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.20.20.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/4 ms

isis#ping 10.20.20.2

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.20.20.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/4 ms

I can reach my file server pegasus from my workstation saber, and i can reach deadalus which is my ESXi server from saber as well, meaning InterVLAN routing is working.

I've tried equivalent config on Netgear GSM7312 L3gigabit switch and 3COM/HP 4924 L3 gigabit switch and the issue remains unsolved.

Thanks for your support.


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