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635
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Routing problem on 3560c ipbase

k.mierzwa
Level 1
Level 1

Hi,

I have a routing problem on cisco 3560c with ipbase licence.

Topology as below:

I can ping from the Switch to MPLS router interface (10.7.0.254) and to other networks behind mpls router. I can also ping from vlan 11 SVI to vlan 10 SVI.

Issue:

I cannot ping from vlan 11 SVI to MPLS router interface.

I have another site with very similar config, if not the same and it all works fine. The only difference is that on the other site I have 3750x, however I believe ipbase licence on 3560c should provide all basic routing services.

Please see the config below:

3560c#sh run
Building configuration...

!

.

!
no aaa new-model
system mtu routing 1500
ip routing
!
ip dhcp pool DATA_LAN
network 10.7.1.0 255.255.255.0
default-router 10.7.1.1
domain-name xxx
dns-server 4.2.2.1
!
no ip domain-lookup
ip domain-name xxx
vtp mode transparent
!
.
!
spanning-tree mode rapid-pvst
spanning-tree extend system-id
spanning-tree vlan 1-4094 priority 12288
!
vlan internal allocation policy ascending
!
vlan 10
name TRANSIT
!
vlan 11
name DATA_LAN
!

.
!
interface GigabitEthernet0/2
switchport access vlan 11
switchport mode access
spanning-tree portfast
!
interface GigabitEthernet0/8
description LINK_TO_BT_MPLS_ROUTER_ge0/1
switchport access vlan 10
switchport mode access
mls qos trust cos
!

.
!
interface Vlan1
no ip address
shutdown
!
interface Vlan10
description TRANSIT
ip address 10.7.0.1 255.255.255.0
!
interface Vlan11
description DATA_LAN
ip address 10.7.1.1 255.255.255.0
!

.
!
ip default-gateway 10.7.0.254
ip classless
ip route 0.0.0.0 0.0.0.0 10.1.0.1 name INTERNET
ip route 10.0.99.0 255.255.255.224 10.7.0.254 
ip route 10.0.99.32 255.255.255.224 10.7.0.254 
ip route 10.0.99.64 255.255.255.224 10.7.0.254 
ip route 10.0.99.253 255.255.255.255 10.7.0.254
ip route 10.1.0.0 255.255.240.0 10.7.0.254 
ip route 10.2.0.0 255.255.240.0 10.7.0.254 
ip route 10.3.0.0 255.255.240.0 10.7.0.254 
ip route 10.4.0.0 255.255.248.0 10.7.0.254 
!
ip access-list extended VTY-access
permit tcp 10.0.99.0 0.0.0.255 any eq 22
permit tcp 10.255.254.0 0.0.0.255 any eq 22
deny ip any any
!

On some other thread regarding similar issue on 3750x I found the following solution:

- do a no ip routing
- save the config
- backup config to flash
- erase startup config
- reload the 3750x switch
- copy config from flash to run
- enter command ip routing

However I`m not on site and have only remote access at the moment, so I would prefer to find another solution. Besides, the above was on 3750x and apparently there was some glitch somewhere. Mine 3750x works fine, just have an issue with 3560c.

Thanks in advance.

Krystian

3 Replies 3

Pawan Raut
Level 4
Level 4

It is very simple your MPLS router do not have route for  vlan 11 10.7.1.0/24.

You can configured static route on MPLS router as 

ip route 10.7.1.0 255.255.255.0 10.7.0.1

@Saratpha

Thanks for the post, however in this case it turned out that ISP put wrong subnets in the routes on MPLS router.

As soon as they corrected it it worked.

@Pawan Raut

Many thanks for fast reply and helping to sort out the issue.

sarathpa
Level 1
Level 1

Hi,

You can run any dynamic routing protocol between VLAN 10 SVI and MPLS router to advertise VLAN 11 subnet.

Or you can do the static or dynamic NAT or NAT-PAT to convert the source IP address