10-24-2001 06:25 AM - edited 03-01-2019 06:59 PM
1. I have a 2924 that I have segmented into 3 Vlans all on seperate subnetworks, I have a 100Mb connection to my central router for each Vlan. The question I have is do I have to have the 3 100Mb connections or is there a way to have all 3 Vlans traffic routed over one 100Mb trunk.
2. I also have a 5505 that I would like to use in the same manner. I currently have three 100Mb connections from a router feeding 3 differant switches a 5505 and two 2924's each on seperate subnetworks. Is there a way to have one 100Mb connection feed the 5505 and establish Vlans off the 5505 for the two 2924's without using a route switch module even though they are on seperate subnets?
10-24-2001 06:37 AM
John,
In reply to your queries:
1. Yes, you can most definately have all 3 VLAN's traffic routed over one 100MB link from router to switch. This uses a concept called VLAN trunks which is quite common in switched networks today. You need to see what kind of router you have got. If it is Cisco the chances are it does support VLAN trunks. You need to set-up both the uplink port on the switch and the ethernet port on the router to the type of VLAN trunk you require. You are best looking on the Cisco website to see how to configure this.
2. Yes, this could be done but it would be tricky. You would need to use VLAN trunks from the 2924 to 5505, then another trunk to the router from the 5505. Again, you would need to look at the website for the config commands or I would be typing forever!
Hope this helps,
Darren.
10-24-2001 08:37 PM
Ok.You can configure the interface of 2924 used to connect Router to trunk mode,then on the router you can create subinterface to routing traffic from different vlan.The router(1600/2600/3600) must have IP PLUS or more high version to support subinterface function.cisco 7000 or high can support subinterface with any version IOS.
for question 2,you must config interfaces between network device to trunk mode.
on 2924:
int fast 0/20
switchport mode trunk
switchport trunk encap isl/dot1q
On 5505:
set trunk x/y on isl
on Router
int fast 0/0.1
encap isl/dot1q VLAN#1
ip address x.x.x.x
int fast 0/0.2
encap isl/dot1q VLAN#2
10-29-2001 08:34 AM
You can connect your router to the first switch via a trunk port. You configure one port on your router and one port on your switch as a trunk port with a 100mb connection between them. The trunk port will carry the communications from multiple vlans. You can then connected switch two and three to switch one via 100mb cross over cables.
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