Cisco 3560 and Vlans (500 points up for grabs here)
we have 2 cisco 3560 switches connected together via fibre using a sfp module runnung as a 802.1q trunk. I have set up 3 vlans on both switches.
|---------| |---------|
| --------| __________ |---------|
A Fibre B
hostname A
interface Vlan1
ip address 192.168.1.254
interface Vlan 10
ip address 192.168.10.254
interface Vlan 20
ip address 192.168.20.254
interface range fa 0/1 - 12
switchport mode access
switchport access vlan 10
interface range fa 0/13 -24
switchport made access
switchport access vlan 20
I have set the GI0/1 to a 802.1q Trunk.
I have configured swith B in a very similar fassion, but given the commands
interface vlan 1
ip address 192.168.1.253
interface vlan 10
ip address 192.168.10.253
interface vlan 20
ipaddress 192.168.20.253
again i have set gi0/1 to a 802.1q trunk.
I have set devices in each vlan to have a default gateway of the vlan address on router A.
My question is is the the correct way to do this, do I need to assign a ip address to each vlan on each switch or should i just assign address's on switch A, I seemd to have a few connectivity issues until I issued a "ip routing" on each switch.
It does seem to be working but is it correct.
Thanks very much
This Question has been solved and asker verified All Experts Exchange premium technology solutions are available to subscription members.
Experts Exchange has been collecting answers to technology questions since 1996…3 million and counting! If you have a question, chances are we already have your answer.
If you can't find the exact answer you're looking for, ask our exclusive community of 50,000 experts. You’ll get a personalized answer from a trusted professional.
Thousands of free tech tips, tricks, how-to’s and tutorials are available in our peer reviewed articles section. See for yourself how smart our experts are, no login required.
Save solutions to your questions, answers you’ve discovered through searching plus helpful articles in your personal knowledgebase for easy future access.
Access the answers to your technology questions today.
30-day free trial. Register in 60 seconds.
Members of the expert community talk about why the experience at Experts Exchange is different than what you will find anywhere else.
Try it out and discover for yourself.
30-day free trial. Register in 60 seconds.
Join the community of experts here and help other tech pros by answering question in your area of expertise. You can earn FREE access to all Experts Exchange's premium features and resources.
Hi webleyaxsor,
On both switches, you may consider to insert "Standby" commands to achieve HSRP.
http://www.cisco.com/unive
Hope this may help to resolve your problem.
Thanks.
Hi webleyaxsor,
You can leave VLAN1 as your management VLAN which does not have any hosts attached to it. And assign IP for the 2 switches in VLAN1.
It is common to assign IP to each VLAN and this IP can be your VLAN default gateway IP. The key is that you have to enable ip routing in your switches so they know how to route.
Hi,
Do you need HSRP in your environment? If you do not need it, then you may consider to remove/shutdown all VLANs except management VLAN on one of your 3560 switch. Leave only one 3560 to become your Inter-VLAN router in your network. On layer 2, just join to the same VTP domain and trunked the uplink. On the client, set default-gateway to the VLAN interface IP address.
Hope this will help to resolve your problem.
Thanks.
Thank you for all your responses, the config above is for both switch A and B, and yes everything is working I can ping all addresses on all 3 vlans, i do not rquire hsrp in this particular solution, the reason for the 3 vlans is we have voice and data so voice is one vlan and data is the other, I did have some
confusion with the pings until i used the "ip routing" command which has created a routing table so all is now well. Thanks for all your help guys .
andy
Business Accounts
Answer for Membership
by: ian_chardPosted on 2007-05-22 at 00:36:07ID: 19132201
Hi,
As you have set IP Addresses on each VLAN interface on each switch, there might be some confusion as the traffic is also trunked between the two switches.
Is router A a seperate device or is it Switch A in the above example?
If it is the switch, then take the VLAN Interfaces of off Switch B and just use it as a Layer 2 device. The traffic can be routed through Switch A and back no problem.
You can set a seperate 'Management' VLAN up on each switch to allow you to Telnet to it etc. but don;t put any hosts in that VLAN.
How does that sound?