Vlan config problem

[rushrest]

Hi Guys i have been working on this since last 2 days. But still not able to solve it.Hooping you guys can help.

I have 2 core switch. redundant mode omni 9700
My network consists of 6850 (Fiber switch) as distribution and 6224 as edge. below is the scenerao

We have lots of Vlans here. Since it is a Hotel Environment.

I made a new vlan in the core, Vlan 911. with Vlan interface 50.50.50.20

The distribution switch (6850) which is physically distant. I created the same vlan 911 with vlan interface 50.50.50.21.

I tagged those on the 802.1q and they are able to ping each other. (vlan 911 802.1q 1/12)

Now From distribution 6850 to the Villa/

Villa also has similar 6850 switch. And from there it connects to the edge switch 6224 via fiber and then to guest via ethernet
Now from the distribution switch 6850 to the villa 6850.They are not able to ping.I created the Vlan 911 at the villa 6850 switch as well with the Vlan interface 50.50.50.22. But they can not ping each other.I added it on 802.1q on all the ports. Since i don't know the exact fiber connection from the distribution point to the villa 6850 switch. So after one by one i tagged the vlan on all the fiber interfaces in the villa and at the distribution switch. But still no communication between them

Now from the villa 6850 to the edge switch 6224. they can ping each other. So they are fine.Villa 6224 IP is 50.50.50.23.
Problem is 6850 of villa to the 6850 of distribution point has no communication.
I heard about IP Helper command. I am not sure what exactly it does and when to use it.
Any comments are welcome.
Thanks
Rushrest

[devnull]

Guess you need a network diagramm and some basic knowledge.

You don't need (and probably in a hotel environment) don't want to have a routing instance on each switch.

I'd normally do:
create a vlan on all needed switches (9700, 6850, 6224) and tag it to the apropriate down/uplinks.

Create one IP (default gateway) address in the network either on a firewall or on the 9700 (I'd have security concerns of having guest crawling your networks)

move one port to VLAN 911 give your notebook a ip of 911 and try to ping the default gateway. should succeed on every switch. if not check upolink from this switch towards core (try amap/lldp if unsure)

Remember if you have
9700 -> 6850_1 -> 6850_2 -> 6224

you need to tagg the vlan on downlink of 9700
you need to tagg the vlan on uplink of 6850_1
you need to tagg the vlan on downlink of 6850_1
you need to tagg the vlan on uplink of 6850_2
you need to tagg the vlan on downlink of 6850_2
you need to tagg the vlan on uplink of 6224

If you have a redundant 9700 (two chassis) you probably need vrrp, tag it on the links between the two chassis and tag the same as above on the links from 9700_2 downwards.

ip helper is for dhcp when clients in vlan 911 receive their dhcp address from a server in a different vlan.