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Routing in SG500-52

verdura
Level 1
Level 1

Hi all,

 

I want to permit several VLAN reach internet but can't with the setup (maybe poorly!) I designed. Here goes...

I have 3 VLANs to do InterVLAN routing in a switch Layer 3 and for reach the internet with gateway. My problem is the L3 switch that don't route to a gateway and do it to another. Here are some o the configs (try to minimize not to give you all much trouble!):

 

SWITCH L3

set system mode router queues-mode 4 
...

interface vlan 100
name FORMACAO
ip address 192.168.100.50 255.255.255.0
ip dhcp relay enable
!
interface vlan 110
name OPERACOES
ip address 192.168.110.50 255.255.255.0
ip dhcp relay enable
!
interface vlan 120
name SERVIDORES
ip address 192.168.200.50 255.255.255.0

...
interface gigabitethernet1/1/18
description "GW UBIQUITI"
switchport trunk allowed vlan add 100,110,120,400,500
...
interface gigabitethernet1/1/48
description IPBRICK
ip source-guard
switchport mode access
switchport access vlan 120
...
ip default-gateway 172.30.1.254

 

The default gateway 172.30.1.254 is on "gigabitethernet1/1/18" and if I change to "ip default-gateway 192.168.200.254" all works fine (port "gigabitethernet1/1/48" ).

Some more info within switch:

 

SW-RT-Servidores#sh ip route
Maximum Parallel Paths: 1 (1 after reset)
IP Forwarding: enabled
Codes: > - best, C - connected, S - static
S 0.0.0.0/0 [1/1] via 172.30.1.254, 00:01:21, vlan 400
S 10.0.0.0/8 [1/1] via 192.168.200.254, 195:30:49, vlan 120
C 172.16.0.0/16 is directly connected, vlan 500
C 172.30.1.252/30 is directly connected, vlan 400
C 192.168.1.0/24 is directly connected, vlan 1
C 192.168.100.0/24 is directly connected, vlan 100
C 192.168.110.0/24 is directly connected, vlan 110
C 192.168.200.0/24 is directly connected, vlan 120

 

SW-RT-Servidores#traceroute ip 8.8.8.8
Tracing the route to google-public-dns-a.google.com (8.8.8.8) from , 30 hops max, 18 byte packets
Type Esc to abort.
1 172.30.1.254 (172.30.1.254) <20 ms <80 ms <20 ms
2 192.168.254.250 (192.168.254.250) <20 ms <20 ms <20 ms
3 xxxx-79-85-21.static.net.xxxx.pt (xxx.79.85.21) <20 ms <20 ms <20 ms
4 10.255.48.82 (10.255.48.82) <20 ms <20 ms
Trace aborted.

 

Here are more configs from different equipments. From a PC with gw to the switch:

tracert 8.8.8.8

1 2 ms 3 ms 4 ms 192.168.100.50
2 * * * O pedido excedeu o tempo.
3 * * * O pedido excedeu o tempo.

 

but if I change to "ip default-gateway 192.168.200.254" all works fine!

tracert 8.8.8.8

1 1 ms 4 ms 4 ms 192.168.100.50
2 1 ms <1 ms <1 ms proxy.cinel.ufp [192.168.200.254]
3 1 ms <1 ms <1 ms 192.168.254.250
4 2 ms 2 ms 2 ms xxxx-79-85-21.static.net.xxxx.pt [xxx.79.85.21]
5 7 ms 6 ms 6 ms 10.255.48.82
6 6 ms 6 ms 6 ms xx.14.xx.210

 

the ip routing table from the default gateway 172.30.1.254:

 

admin@GATEWAY:~$ show ip route
Codes: K - kernel route, C - connected, S - static, R - RIP, O - OSPF,
I - ISIS, B - BGP, > - selected route, * - FIB route

S>* 0.0.0.0/0 [1/0] via 192.168.254.250, eth2
C>* 127.0.0.0/8 is directly connected, lo
C>* 172.16.0.0/16 is directly connected, eth0.500
C>* 172.30.1.252/30 is directly connected, eth0.400
C>* 192.168.1.0/24 is directly connected, eth0
C>* 192.168.100.0/24 is directly connected, eth0.100
C>* 192.168.110.0/24 is directly connected, eth0.110
C>* 192.168.200.0/24 is directly connected, eth0.120
C>* 192.168.254.0/24 is directly connected, eth2

 

To my knowledge all should worked but...

Can you guys please put me in the right path?

 

Thanks and if you need more configs tell me please!

 

 

 

 

 

 

 

 

 

 

2 Replies 2

mipopov
Cisco Employee
Cisco Employee

Hello Verdura,

Try to assign the IP to VLAN 400 from 172.30.1.252/30 network.

What happens?

Cheers,

Mike

I already have done it:

 

 

interface vlan 100
name FORMACAO
ip address 192.168.100.50 255.255.255.0
ip dhcp relay enable
!
interface vlan 110
name OPERACOES
ip address 192.168.110.50 255.255.255.0
ip dhcp relay enable
!
interface vlan 120
name SERVIDORES
ip address 192.168.200.50 255.255.255.0
!
interface vlan 400
name SW-GW
ip address 172.30.1.253 255.255.255.252
!

 

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