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

[Richard Burts]

At Jon's request I am looking at this issue. It is complex and will take me a bit to try to understand it. I gather there were some other posts/other threads about this. Is there any information in those that would help me to understand the context and what the issue is?

HTH

Rick

[dragan_adrian_remus]

Hello Rick,

thank you for your answer.

http://rf.harris.com/capabilities/tactical-radios-networking/rf-7800m/default.asp; there is a pdf datasheet; also I'm at your disposal with other answers.

Regards,

Adrian.

[dragan_adrian_remus]

Jon summarized my problem very good; I want to extend my VoIP (you'll find here all details about it) trough this radio net , over the air. The problem is the endpoints are on different networks, and I need static routes, a routing protocol and/or a 2901 to connect to my switches that are in the same subnet. Please help me with that.

Adrian.

[Richard Burts]

Adrian

I think that I finally have an understanding of this. I have looked at a number of pages from Harris and the key thing was in discovering what is involved in anw2   Advanced Networking Wideband Waveform. This appears to be an IP based proprietary technology that creates a mesh network in which the radios all talk to each other and learn about each other and about the IP subnet connected to each radio. One of the key assumptions here is that each radio will have a unique IP subnet connected to it.

It is pretty clear that the environment that you started with was a switched network with trunks connecting the switches. It means that all of the end point devices (phones or PCs or whatever) were in the same VLAN and therefore in the same subnet.

It is my understanding (and I hope you will correct me if I am not right) that you want to put a Wide Area Network (WAN) into this replacing the switch trunks with the ANW2 network. There is a problem in doing this because ANW2 assumes different subnets at each radio and your original design wants the same subnet at each end. And I think that an additional problem is that your drawing early in this thread shows both a data vlan and a voice vlan. But what I am reading about the radios and the ANW2 suggests that they have only a single subnet.

So the solution that we are looking for would seem to be some type of tunneling solution that could extend multiple layer 2 vlans over a Wide Area Network. I suggest that L2TPv3 is probably the best solution. You can find details of this feature at this link

http://www.cisco.com/en/US/docs/ios/12_0s/feature/guide/l2tpv30s.html

This article shows that with purchase of the Data license that L2TPv3 is supported on ISR gen 2 routers like the 2901.

http://www.cisco.com/en/US/prod/collateral/routers/ps10616/white_paper_c11_556985_ps10536_Products_White_Paper.html#wp9000807

And this link has an example configuration using L2TPv3

http://www.cisco.com/en/US/tech/tk364/technologies_configuration_example09186a00801f66fa.shtml

I acknowledge that this is complicated to implement. It might make it easier and more simple to implement to change the design so that site A and site B were in different IP subnets.

HTH

Rick

[dragan_adrian_remus]

Rick,

I if I change the design and B is in different subnet, how it works? With router each end betwen radios and switches?

Can you write down this configuration for me?

Adrian.

[Richard Burts]

Adrian

I will try to come up with some config suggestions. There are a couple of questions which you could answer that would be helpful. I believe that it could be possible to do this with just the 3560 switches (as Jon has suggested) and use them to route between vlans or the solution could use 2901 routers to do the routing. Which would you prefer?

Also in the drawing that you posted you show the voice vlan as a /30 network. Is that correct? That would indicate that there are only 2 addresses in the subnet. One address would be the UC560 and what is the other address? Or is the voice vlan really larger and will be on both switches?

HTH

Rick

[dragan_adrian_remus]

Rick,

my mistake and sorry for that. Voice vlan is larger, on both switches; in this moment contains 4 IP phones (two in each switch) and UC (switch A), but I plan to add 2 more phones each. Data vlan is also on both switches, and I prefer the 2901 solution, because I plan to add later a couple of laptops to data vlan. Please help me with 2901 setting in both locations.

Thank you,

Adrian.

[dragan_adrian_remus]

Rick,

do not hesitate to ask me for further information, if it's necessary.

Thank you,

Adrian.

[dragan_adrian_remus]

I also send you a part from radio manual, about interconnecting; they gave an example for a single acces point (one radio exits to wide network......I need both of them).I'm sure they will help you make an opinion.

[Richard Burts · Accepted solution]

Adrian

Here are the important parts of the configuration of the 2901 routers. I do not know how you have your 3560 switches configured other than that they have both vlans configured and have a trunk interface configured. That should be able to work with the router. If the switches have any IP addresses configured or have any routing configured then that might be something that could need adjusting. But for now I am going to assume that the switch configuration is simple and just has the vlan configuration and the trunk configuration.

For this to work there need to be different subnets/networks at point A and point B. So I am going to assume these networks but you could change them to different networks if you want.

point A                                 point B

192.168.10.0  vlan 10            192.168.11.0 vlan 10

10.0.10.0       vlan 20             10.0.11.0      vlan 20

192.168.5.0   router to radio   192.168.6.0  router to radio

2901 A

config t

interface gig0/0

description connect to radio

ip address 192.168.5.1 255.255.255.0

no shut

interface gig0/1

description connect to switch

no shut

interface gig0/1.10

description data vlan

encapsulation dot1q 10

ip address 192.168.10.1 255.255.255.0

interface gig0/1.20

description voice vlan

encapsulation dot1q 20

ip address 10.0.10.1 255.255.255.0

! add routes for subnets at point B

ip route 192.168.11.0 255.255.255.0 192.168.5.2

ip route 10.0.11.0 255.255.255.0 192.168.5.2

2901 B

config t

interface gig0/0

description connect to radio

ip address 192.168.6.1 255.255.255.0

no shut

interface gig0/1

description connect to switch

no shut

interface gig0/1.10

description data vlan

encapsulation dot1q 10

ip address 192.168.11.1 255.255.255.0

interface gig0/1.20

description voice vlan

encapsulation dot1q 20

ip address 10.0.11.1 255.255.255.0

! add routes for subnets at point B

ip route 192.168.10.0 255.255.255.0 192.168.6.2

ip route 10.0.10.0 255.255.255.0 192.168.6.2

You would need to set up the radios for these addresses and to route these subnets. And you would need to be sure that the devices connected to the switches have their default gateway set to the corresponding address on their vlan on the router.  When those things are doine I believe that this should work.

HTH

Rick

[dragan_adrian_remus]

Rick,

Thank you for your help.

Best regards,

Adrian