IP routing

[Wael Jarad]

Hi,

i have a 4500 switch which was used before to be a layer 2 switch connected to the core using trunk.

i removed this switch from the network and put it in a separated network. i am trying to change it to layer 3 switch but the problem it is not converting to layer 3.

please assist.

Thanks

[Latchum Naidu]

Hi,

Catalyst 4500 series switch supports Layer 3 interfaces with the Cisco IOS IP and IP routing protocols

And also Catalyst 4500 series switch supports two types of Layer 3 interfaces. The logical Layer 3 VLAN interfaces integrate the functions of routing and bridging. The physical Layer 3 interfaces allow the Catalyst 4500 series switch to be configured like a traditional router.

Please follow the below steps in order to get L3 function on all the interfaces.

Switch# configure terminal
Enter configuration commands, one per line.  End with CNTL/Z.
Switch(config)# ip routing
Switch(config)# interface fastethernet 2/1
Switch(config-if)# no switchport
Switch(config-if)# ip address 10.1.1.1 255.255.255.248
Switch(config-if)# no shutdown
Switch(config-if)# end

Hope the above clear and understood.

please click on the correct answer on all posts if they answered your question.
Regards,
Naidu.

[Wael Jarad]

Thanks alot for your reply.

i am trying to route between vlans.

when it was in L2 environment vlans use trunk to reach the core to be rourted their.

[Latchum Naidu]

Hi,

Inter Vlan routing will does in 4500 series.

Use the show vlan command to verify that the VLANs exist in the VLAN database. If they do not
exist, you must add them on the switch.

See the below link for step by step information.
http://www.net130.com/tutorial/cisco-pdf/howto_L3_intervlanrouting.pdf

please click on the correct answer on all posts if they answered your question.
Regards,
Naidu.

[Thotsaphon Lueangwattanaphong]

Hi Weal,

    Please post the current configuration on C4500. You need to create VLAN interfaces on this C4500 instead the old one. To make sure that you already enable an "ip routing" command on it. You can use a "show ip route" command to verify. You should see each vlan interface there If vlan interfaces are up.

HTH,

Toshi

[Wael Jarad]

the scenario here is that i created some vlans ...but i am not sure whether the vlans i created were existing before. and then i wrote ip routing and they are working fine. i am trying to add new vlans and it is adding the vlans but no routing between the new vlan and the existing vlans occurs.

static route shown only for the routed vlans.

[Latchum Naidu]

Hi,

You need to add the new vlan in vlan database also. See the below example.

Switch#vlan database
Switch(vlan)#vlan 2
VLAN 2 added:
Name: VLAN0002

And check the vlan status by giving command "show interface vlan 2" and check the status.

please click on the correct answer on all posts if they answered your question.
Regards,
Naidu.

[Wael Jarad]

i will try these commands as soon as i can.

i have another question:

i have 3 sites connected to each other using MPLS which uses bgp protocol. lets say i have site A , B and C. each site has core switch and access switches.

site A:

vlan 10 : 172.29.10.0/24

vlan 11:  172.29.11.0/24

vlan 12:  172.29.12.0/24

site B:

vlan 10 : 172.30.10.0/24

vlan 11:  172.30.11.0/24

vlan 12:  172.30.12.0/24

site B:

vlan 10 : 172.31.10.0/24

vlan 11:  172.31.11.0/24

vlan 12:  172.31.12.0/24

i configured access list on vlan 10 in site A in order to secure it. i have added a server in this vlan and the clients that want to reach this server have to be in the same vlan in site A.

i got a requirement, that a user located in site B wants to be in the same secured vlan in site A ( vlan 10 in site A) in order for the security to be applied and in order to reach the server.

advice!!!!!

[Wael Jarad]

It is an SVI settings. vlan would not be routed unless it is used in a trunk or an up interface. otherwise vlan wont route.