Solved: Inter-vlan Routing

rodrigo2673 · ‎10-12-2013

Hello,

I hope you can help me. I am not sure what I'm missing in this configuration. I've 2 PC's in 100.0.0.0/24 Vlan 100 on a 3550 switch. I've created an SVI 10 connected to my sky router (192.168.0.0/24)

Here is the info:

Top#sh ip int bri | exc una

Interface IP-Address OK? Method Status Protocol

Vlan10 192.168.0.100 YES manual up up

Vlan100 100.0.0.10 YES manual up up

Gateway of last resort is 192.168.0.1 to network 0.0.0.0

100.0.0.0/24 is subnetted, 1 subnets

C 100.0.0.0 is directly connected, Vlan100

C 192.168.0.0/24 is directly connected, Vlan10

S* 0.0.0.0/0 [1/0] via 192.168.0.1

Top#ping google.com

Sending 5, 100-byte ICMP Echos to 173.194.41.142, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 40/41/44 ms

Top#

Top#ping 100.0.0.1

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 100.0.0.1, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 1/3/4 ms

Top#ping 100.0.0.2

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 100.0.0.2, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms

Top#ping 192.168.0.1

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 192.168.0.1, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms

Top#

Top#sh ip cef

Prefix Next Hop Interface

0.0.0.0/0 192.168.0.1 Vlan10

0.0.0.0/32 receive

100.0.0.0/24 attached Vlan100

100.0.0.0/32 receive Vlan100

100.0.0.1/32 attached Vlan100

100.0.0.2/32 attached Vlan100

100.0.0.10/32 receive Vlan100

100.0.0.255/32 receive Vlan100

192.168.0.0/24 attached Vlan10

192.168.0.0/32 receive Vlan10

192.168.0.1/32 attached Vlan10

192.168.0.2/32 attached Vlan10

192.168.0.5/32 attached Vlan10

192.168.0.12/32 attached Vlan10

192.168.0.100/32 receive Vlan10

192.168.0.255/32 receive Vlan10

224.0.0.0/4 drop

224.0.0.0/24 receive

240.0.0.0/4 drop

255.255.255.255/32 receive

From my client PC's in vl 100 (100.0.0.1/24)

C:\>ping 192.168.0.1

Pinging 192.168.0.1 with 32 bytes of data:

Request timed out.

Ping statistics for 192.168.0.1:

Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),

Ethernet adapter Lan:

Connection-specific DNS Suffix . :

IP Address. . . . . . . . . . . . : 100.0.0.1

Subnet Mask . . . . . . . . . . . : 255.255.255

Default Gateway . . . . . . . . . : 100.0.0.10

C:\>ping 100.0.0.10

Pinging 100.0.0.10 with 32 bytes of data:

Reply from 100.0.0.10: bytes=32 time=2ms TTL=255

thank you in advance,

Rod

cadet alain · ‎10-12-2013

Hi,

Does the sky router have a route back to 100.0.0.0/24 network, if it hasn't then it won't work.

Regards

Alain

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View solution in original post

RAJMOHAN RAMAMOORTHY · ‎10-12-2013

Hi Rodrigo,

Please verify "ping 192.168.0.1 source vlan 100" from you switch.

If ping fails, verify the routing table entries in your sky router - "show ip route 100.0.0.0"

If it does not have a route, add a static route "ip route 100.0.0.0 255.255.255.0 192.168.0.100"

Again verify "ping 192.168.0.1 source vlan 100" from you switch.

Rajmohan R

View solution in original post

rodrigo2673 · ‎10-12-2013

sorry forgot to add sh vl bri

VLAN Name Status Ports

---- -------------------------------- --------- -------------------------------

1 default active Fa0/4, Fa0/5, Fa0/6, Fa0/7

Fa0/8, Fa0/9, Fa0/10, Fa0/11

Fa0/12, Fa0/13, Fa0/14, Fa0/15

Fa0/16, Fa0/17, Fa0/18, Fa0/19

Fa0/20, Fa0/21, Fa0/22, Fa0/24

Gi0/1, Gi0/2

10 Ferrari active Fa0/2

20 Lamborghini active

100 VLAN0100 active Fa0/3, Fa0/23

1002 fddi-default act/unsup

1003 token-ring-default act/unsup

Vlan100 is up, line protocol is up

Internet address is 100.0.0.10/24

Broadcast address is 255.255.255.255

Address determined by setup command

Vlan10 is up, line protocol is up

Internet address is 192.168.0.100/24

Broadcast address is 255.255.255.255

Address determined by setup command

cadet alain · ‎10-12-2013

Hi,

Does the sky router have a route back to 100.0.0.0/24 network, if it hasn't then it won't work.

Regards

Alain

Don't forget to rate helpful posts.

rizwanr74 · ‎10-12-2013

Hi Rodrigo,

Please try to extended ping "google.com" by sourcing from svi 100

ping

Protocol [ip]: 4.2.2.2

Source address or interface: 100.0.0.10

If you cannot ping, then there is nat missing for network segment 100.0.0.0/24.

You should able to ping 192.168.0.100 from you PC though.

thanks

Rizwan Rafeek.

RAJMOHAN RAMAMOORTHY · ‎10-12-2013

Hi Rodrigo,

Please verify "ping 192.168.0.1 source vlan 100" from you switch.

If ping fails, verify the routing table entries in your sky router - "show ip route 100.0.0.0"

If it does not have a route, add a static route "ip route 100.0.0.0 255.255.255.0 192.168.0.100"

Again verify "ping 192.168.0.1 source vlan 100" from you switch.

Rajmohan R

gajularamu · ‎10-13-2013

Hi Rodrigo,

I guess what Cadet siad is right, did you check on your sky router that it is having a route back to vlan100?

if not,u can give static route for vlan 100 network on router facing to switch vlan 10.

the other case, you can make router acting like host by disbling the route lookup and giving the default-gateway to vlan 10.(if you want your router to act like host just like the othetr PC's.

Thanks & regards

Ramu Gajula

rodrigo2673 · ‎10-13-2013

Thank you All for all your replies.

Unfortunately there is no option in the Sky router to add a static route back to my vlan(s)

Best regards,

Rod

cadet alain · ‎10-14-2013

Hi,

ok in this case is there any option to run a routing protocol like RIPv2 on the Sky router?

if so then you can advertise these vlan to the router with RIPv2 on the switch.

The last problem is that maybe the router won't accept to NAT the vlans and in this case you won't be able to get to the Internet because you can't NAT on the L3 switch and your vlans will only be able to talk to the router but not further.

Regards

Alain

Don't forget to rate helpful posts.