3750 Switch Configuration

Answered Question
Jun 15th, 2009

I have two Cisco 3750 switches. Each switch has a single VLAN. I want to configure routing between the two 3750 switches without using any other equipment. How do I configure this?

Correct Answer by thotsaphon about 7 years 8 months ago

George,

You need to have IOS feature set as IP services or Advanced IP Services to enable OSPF. You can check it by using a "show version" command.

Regarding the configuration. It's not hard. You just create 3 networks as I mentioned. You then enable OSPF(if supported) on them.

For Sw3750 here you go :http://www.cisco.com/en/US/docs/switches/lan/catalyst3750/software/release/12.2_50_se/configuration/guide/scg.html

HTH,

Toshi

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thotsaphon Mon, 06/15/2009 - 06:42

George,

You're going to test routing between L3 switches. So you should assign 3 networks between them.

(Network1) ---SW3750_1---(Network2)----SW3750_2---(Network3)

Toshi

Correct Answer
thotsaphon Mon, 06/15/2009 - 10:39

George,

You need to have IOS feature set as IP services or Advanced IP Services to enable OSPF. You can check it by using a "show version" command.

Regarding the configuration. It's not hard. You just create 3 networks as I mentioned. You then enable OSPF(if supported) on them.

For Sw3750 here you go :http://www.cisco.com/en/US/docs/switches/lan/catalyst3750/software/release/12.2_50_se/configuration/guide/scg.html

HTH,

Toshi

Joseph W. Doherty Mon, 06/15/2009 - 12:52

Can you stack the switches?

If not, besides what Toshi notes, static and RIP routing is included in the base IOS image (saves you up to $4K [per 3750] in licensing).

zaidumer Tue, 06/16/2009 - 04:51

hi,

you can try this .. lets say your network looks like this..

net1--[SW1]--net2--[SW2]--net3

network 1 is 192.168.1.x/24

network 2 is 192.168.27.x/29

network 3 is 192.168.3.x/24

On SW1 do this.........................

interface GigabitEthernet1/0/22

description SW1-SW2 link

switchport access vlan 2

interface Vlan1

ip address 192.168.1.254 255.255.255.0

interface Vlan2

ip address 192.168.27.1 255.255.255.252

router rip

redistribute static

network 192.168.1.0

network 192.168.27.0

On SW2 do this ..........................

interface GigabitEthernet1/0/22

description SW1-SW2 link

switchport access vlan 2

interface Vlan1

ip address 192.168.3.254 255.255.255.0

interface Vlan2

ip address 192.168.27.2 255.255.255.252

router rip

redistribute static

network 192.168.3.0

network 192.168.27.0

=========end================

you can try static routes if you dont want to use RIP

hope this works for you .. plz rate if helpful

everestmountain Tue, 06/16/2009 - 06:10

After I have created the VLans, how do I provide IP address for the specifice ports assigned to a VLAN?

everestmountain Tue, 06/16/2009 - 09:27

The IP addresses for each port will be automatically assigned, when a computer is connected to the port. Each computer must be configured with an IP address in the subnet, for the VLAN of the port, to which it will be connected.

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