SRP 500 series

I have a pre-WiMax 2 MB link (labeled ethernet frames) the provider of services on cable RJ - 45 and MS give us / 29 public IPs range

one of them as our default gateway so I have 5 available real IPs to use in my network

now my goal is:

Assign one of these real IP to the WAN port on my router and make this port labeled ethernet support by assigning a 802 marking. 1 q this interface (or subinterface)

use the DHCP protocol for users in the local wireless and wired network interface

NAT allows to convert DHCP range private IPs to the public IP address that is assigned to the WAN interface

the rest of my IP range public give them, if possible, to any internal server to make them public and routable (accessible from anywhere)

I chose SRP521W as my first choice if not applicable I'll go with SRP541W, is this applicable? /?

and what is the different btw SRP521W and SRP521W versions - U

Thanks in advance

Hi Marc,

Last question first - SRP521-U has more memory than the SRP521 and is able to run the latest firmware 1.2.x.  The SRP521 can run firmware version 1.1.  For your application in the present case, I would recommend the SRP521-U (or the SPR541).

First question - has your MS you provided with just a 29 subnet to be used for your private network, or a 29 for use behind the modem?  In other words, your address IP WAN must come from this pool, or receives it separately?  The answer to that will define the most appropriate solution for you.

If you have this in/29 block addresses to use, so I recommend that you use the option of the DMZ.  This allows you to use one of the 29 as the WAN IP for the router (used for NAT for private customers) and others for your DMZ hosts that need to be connected via the LAN 4 port.

If you have a separate address for the WAN and you can use 29 all internally, then you could create a VLAN separate room for that subnet and use the NAT bypass feature.

To complete your frames marked with MS, just add a new sub on the WAN port interface using the index of the appropriate tag and treat this interface suitable for the connection of SP.  You can leave the address on the main interface (VLAN 0) in the default DHCP mode.  If you are concerned about the DHCP requests, he'll send (no label) to the SP, you can set an IP address that is not in conflict with your address.  You can't delete the main interface.

After you create this interface WAN sub, either enable DMZ equipment and create public IP address mappings for 29, or create a new derivation rule of VLAN and NAT for her.  If you want to control the traffic that can access publicly addressed hosts in this VLAN, you can use advanced for this firewall rules.

All your guests in private by default subnets use default NAT and will be able to communicate with the public hosts through the WAN SRP interface.

All of this is detailed in the Guide administrators SRP500.

Hope that helps,

Andy

Tags: Cisco Support

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