2901

[dragan_adrian_remus]

Hello,

I have this situation now: in point A, I have UC 560, switch 3560 v2 PoE 48, 2 Cisco Ip phones ; in point B, I have switch 3560 v2 PoE 48, 2 Cisco Ip phones. All equipment is configured and functional; the switches are connected through straight cable, between fa 0/2. Vlan's are configured too; interface fa 0/2 (3560) trunked.

Instead of connecting cable, I'll have a radionetwork. The ends of this radionet are in different subnets, but one are the same with one 3560(the one connected with UC 560). So, I'll need to interpose two 2901. Please tell me the settings for these routers.

Regards,

Adrian

[dragan_adrian_remus]

Jon,

here you have a picture with radio net. Redlan's means router(switch) interface where ethernet cable from radio are plugin.

Adrian.

[dragan_adrian_remus]

Jon,

yes, i forgot to tell you the radio station bridges between interfaces.

Adrian.

[Jon Marshall]

Adrian

First you say this -

The link between radios is a separate network, with specific interfaces,  IP's and protocols.

and then -

yes, i forgot to tell you the radio station bridges between interfaces

they can't both be true. i keep writing configurations for you and then you post something else that contradicts what you said before and i have to start again.

So which of the above is true ?

Also do you just want the VoIP vlan to be able to route to the other VoIP vlan ie. what about the data vlans at each site.

Jon

[dragan_adrian_remus]

Jon,

sorry if I was confused. Radio bridges his two interfaces : wireless (to the other radio) and the interface to the switch. And I want both vlans to be able to route to the other side. All 4 IP phones are configured and managed from UC 560.

Thank you,

Adrian.

[Jon Marshall]

Adrian

Apologies but your'e not the only one who is confused. The screenshots you posted suggest the radio stations can route traffic but then they wouldn't be bridging between interfaces.

In fact i can't even visualise how it would work if the radios were bridging unless they bridged traffic at L2 only ie. you couldn't have one of the interfaces routing, it just doesn't make sense.

I am not going to be able to supply a configuration until we sort this out. Basically as far i can see it would look like one of two scenarios -

using 192.168.5.0/30 subnets for each link -

L2 switched (bridged)

======

3560 (192.168.5.1/30) -> radio -> radio -> (192.168.5.2/30) 3560

in the above no IPs are used on the radio stations at all.

routed

=====

3560 (192.168.5.1/30) -> (192168.5.2/30) radio (192.168.5.5/30) -> (192.168.5.6/30) radio (192.168.5.9/30) -> (192.168.5.10/30) -> 3560

in the above each link uses a different IP subnet 

But what you can't have as far as i can see is the radio stations using a different IP subnet to connect to each 3560 but then bridging across the link.

That just doesn't make sense at least to me. Perhaps someone else knows how to do that,

Jon

[dragan_adrian_remus]

Jon,

first of all, thank you so much for your help. Scenarios is routed .

3560(192.168.5.1/30)A - (192.168.5.2/30) radio A  - wireless net 172.16.5.0/30 - (192.168.6.0/30)radio B - (192.168.5.10/30) 3560B. 

Please observe that, because radio A can't be in the same subnet as radio B(because of radio software issue), we must put a 2901 between radio B and switch B, or edit L3 routes. Can you, please, write for me these 2 scenarios?

Thank you,

Adrian.

[Jon Marshall]

Adrian

3560(192.168.5.1/30)A - (192.168.5.2/30) radio A  - wireless net 172.16.5.0/30 - (192.168.6.0/30)radio B - (192.168.5.10/30) 3560B

the above is not possible ie. you have 172.16.5.0/30 and 192.168.6.0/30 in the same link. 

I can't help you much more until you fully explain how this link works. If the radios use a separate subnet to connect to each other on the actual radio link then that would make sense to me. The radios would route between themselves and between themselves and the respective switch.

So as far as the radio station is concerned -

1) does it have two IPs on it one for the interface connecting to the 3560 and another one (from a different subnet) connecting to the radio station at the other end of the link.

I cannot see how it can have only one interface with an IP and still route ie. it is either both or none for passing traffic although it may have one for management.

Jon

[dragan_adrian_remus]

Jon,

a radio station has three interfaces: PPP (point to point network) - used for PC programming via PC serial port; ETHERNET interface, and WIRELESS  interface. ETHERNET is for connecting with other ethernet interfaces(routers, switches...); WIRELESS is only for the radio link, between radios. ETHERNET and WIRELESS  are bridged, for IP traffic goes trough from A to B and B to A. The radiolinks uses one or more frequencies. All bridging process are automatic and does not affect our ip traffic. We are not dealing with wireless ip adressess. Please imagine the link between radios as a cable. Only problem is the radios in A and B can't be in the same subnet. The switches are, so we have a routing problem, that we can solve it with static routes, a routing protocol, and/or a 2901. I don't know how to edit these routes, setting up a 2901 or use routing protocol. That's why I'm here. Is now OK for you?

Adrian.

[Jon Marshall]

Adrian

I would like to help but i can't see how this works ie. if the ethernet and wireless are bridged but you apply an IP to the ethernet interface and the radio stattion routes then i cannot see how to set this up ie.

3560 (192.168.5.1/30) -> (192.168.5.2/30) radio -> radio (192.168.5.5/30) -> (192.168.5.6/30) 3560 (192.168.6.10)

the 3560 routes traffic to the radio station. The radio station then routes traffic but how. What next hop IP would i apply on the radio station to get to the other 3560. Lets say in the above that the 3560 on the left wants to route trafic to 192.168.6.10 -

1) it looks up it's routing table and finds the route with a next hop IP of 192.168.5.2

2) the radio stattion looks up the route for 192.168.6.10 and sees what as the next hop IP ? It can't be 192.168.5.5 because that is a different subnet. The next hop must be in the same subnet.

So how can it route to the other radio station ?

Are you sure you need to apply an IP to the ethernet interface on the radio station ?

That is where the confusion is coming from. The radio station looks like it can route but if it routes then you need a separate subnet between the radios and this is not the case.

I very rarely say this but i think it might be best if i dropped out of this thread as i cannot see how this works which may be down to my lack of understanding.

I will try and see if someone else can provide some help as i don't think, from your descriptions so far, that i can.

Jon

[dragan_adrian_remus]

Jon,

I ping laptop 192.168.5.2 from the other laptop 192.168.6.2. How it works?

Adrian.

[Jon Marshall]

Adrian

Thats a good question.

If you could decribe exactly what IP addresses were used on -

1) the laptops

and

2) what IPs were on any interfaces on the radio stations

that might help explain how it is working.

Jon

[dragan_adrian_remus]

Jon,

here they are: laptop A(192.168.50.10 255.255.255.0 gateway 192.168.50.2)

                     radio A (192.168.50.2 255.255.255.0)

                     laptop B (192.168.40.10 255.255.255.0 gateway 192.168.40.2)

                     radio B (192.168.40.2 255.255.255.0).

In radio A router table:destination: user; destination ip 0.0.0.0.; destination mask 0.0.0.0.; next hop 192.168.50.2; metric 2

In radio B router table:destination:user ; destination ip 0.0.0.0.; destination mask 0.0.0.0.; next hop 192.168.40.2; metric 1

All radios have also Global Net List (all Ethernet IP address for all radios in network, so they know all this).

Wireless network 172.16.2.0 255.255.255.0

[Jon Marshall · Accepted solution]

Adrian

Thank you for that. I have no idea how the radio stations are doing that as the end points are on different networks.

That is why i asked Rick to join in because i think he has a better understanding of bridging than me. If it was just L2 switching or L3 routing it would make more sense to me.

Rick has posted into this discussion, thanks Rick, so i think i will leave it to him otherwise it will get a bit crowded. I think from what you have posted it should be relatively easy to setup but like i say i think Rick would be the best for this.

Jon

[Jon Marshall]

Adrian

I have left a message with one of the other people who post into these forums. He has a huge amount of knowledge so hopefully, if he gets time, he may be able to look at it.

I apologise for not being to help, it's simply that the way it has been described i just can't see how it is meant to work and so i can't supply a configuration for you.

Jon

[dragan_adrian_remus]

Thank you so much for your help, Jon.

Bet regards,

Adrian.