05-30-2008 07:18 AM - edited 03-05-2019 11:19 PM
Hi All I am having trouble with VLans on Cisco 3550. I am using this switch as standalone device. All the end points and hubs and dumb switches are connected to it. I do have a linksys router which is acting as a gateway.
Here is the configuaration
Ip routing
Fastethernet port 1 - 20 Vlan 1
Fastethernet port 21 - 24 Vlan 2
Int vlan 1
Ip address 192.168.70.2 255.255.255.0
ip access-group 101 in
ip access-group 101 out
no ip directed-broadcast
no ip redirects
int vlan 2
ip address 192.168.74.1 255.255.255.0
ip access-group 101 in
ip access-group 101 out
ip helper-address 192.168.70.255
ip helper-address 192.168.70.8
ip forward-protocol UDP 4011
no ip directed-broadcast
no ip redircts
access-list 101 permit ip 192.168.70.1 0.0.0.255 any
access-list 101 permit ip 192.168.74.1 0.0.0.255 any
network 192.168.70.1
network 192.168.74.1
ip route 0.0.0.0 0.0.0.0 192.168.70.1
I really appreciate any help.
05-30-2008 08:09 AM
HI
Can u change u r access-list to
access-list 101 permit ip 192.168.70.0 0.0.0.255 any
access-list 101 permit ip 192.168.74.0 0.0.0.255 any
btw y r u using the access-list.
there is not need for the access-list if u just want intervlan routing.
Thanks
Mahmood
05-30-2008 08:14 AM
Sure I will apply that. I am using access list to explicitly allow communications because intervlan communication was not working. and Also I am new to Cisco so I am trying to get the best I can do
05-30-2008 08:18 AM
Hi
Have u created the vlans.What is default-gateway for u r clients.Seeing u r config there is no need for access-list if u just intend to have intervlan routing.
Thanks
Mahmood
05-30-2008 08:22 AM
Hi Athar,
Hopes you already added "Switchport mode accees vlan 2" to all ports of vlan2. Did you?
Please do "sh vlan" and "sh ip route" commands.
HTH
Thot
05-30-2008 08:36 AM
Yep I did added all the port to Vlan 2 and Sh ip Route does show
192.168.74.0 C
192.168.70.0 C
05-30-2008 08:40 AM
Hi Mahmood,
All the client default gateway for Vlan 2 is 192.168.74.1 Which is the Vlan Ip address. All the clients on the Vlan 1 has the default gateway set to 192.168.70.1 which is the address of the Link sys router. Vlan address of the switch is 192.168.70.2 I have DHCP which is in Vlan 1. I am trying to get the dhcp address for all the clients in VLAN2 from Vlan 1. Microsoft DHCP server is already configured with the DHCP scope
05-30-2008 08:45 AM
OK that's a good explanation.
LinkSys should know about vlan2 network.
Does Linksys has "ip route 192.168.74.0/24 192.168.70.2?
One more thing : It's not a good idea to add your ACls into vlan2 if you want all vlan2 PCs to get dhcp.
It will not work unless you allow bootpc and bootps.
access-l 101 per udp any any bootpc
access-l 101 per udp any any bootps
HTH
Thot
05-30-2008 08:48 AM
Hi
U need to have the default-gateway for u r clients in vlan 1 as the vlan ip address of the switch,becoz u have created the svi for that vlan on the switch it means it going to do intervlan routing.Under u r vlan interfaces on the switch use
ip helper-address (ip address of the dhcp server)
U cannot get the ip address from the vlanw from vlan1 as they are different broadcast domains.
Thanks
Mahmood
05-30-2008 09:28 AM
Hi,
Have you enabled IP Routing on the switch?
Regards
05-30-2008 12:36 PM
Yep I did, I am going to test the switch on monday. for Mahmood I already switched my gateway ip and make Vlan address default gateway and I am able to get the IP from the other vlan through IP helper command. It seems to start working. I will try to enhance furthure
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide