Cisco 871 Router Setup for Public & Private IPs use
Currently, I'm using a Cisco 1721 Router at my HQ with 1 serial wan and 1 ethernet lan port for my network. This router is connected directly to a 8-port gigabit switch where all servers (all servers have 2 NICs but only using 1) and 2 Cisco Catalyst 2950T 24-Port Switches are connected. Local PCs are connected to these 2950T.
The 1721 perform the NAT and while a server does the DHCP.
Static NAT from inside interface to outside i.e. private ip addresses to public ip addresses is also configured on the router to allow outside access to the servers. This is working well for the servers needs.
Now, I'm tasked to configure the network for Toshiba VoIP system using the same internet connection.
Note: Users will still be using the current digital phones and only the back-end pabx is converted to VoIP. As such, the VoIP and local network are physically separated.
I've tried doing the same static NAT for each Toshiba LIPU cards as described above for the servers using other unused public ip addresses but apparently it does not work as Toshiba engineers claimed their system does not work with NAT and that the LIPU cards must be assigned directly with public ip addresses.
Nevertheless, I'm due to received a Cisco 871 Router most probably with default Base Image as part of subscription to our local ISP Ethernet Access Package with the same numbers of 16 public IP addresses for use as the soon to be replaced leased line.
I read that the 871 support 2 VLANs with Base Image. One VLAN dedicated to DMZ. However, I'm not sure if the Base Image also support DMZ. Also due to my lack of knowledge, I also do not know if VLANs and DMZ are indeed the features that I'm looking for that will support the Toshiba VoIP system with its need for public ip addresses and yet retaining as much as possible existing setup for the servers and LAN.
Therefore, I need to know if 871 will support the following requirements and if so through which features and the necessary configuration (briefly) to do.
1)Router to allow private ip addresses (local users) to access the internet as per normal.
2)Router to allow static NAT from inside interface to outside i.e. private ip addresses to public ip addresses for current servers as describe above in current setup.
3)VLANs and/or DMZ to allow 3 x ip addresses to be assigned directly on 3 x Toshiba LIPU cards.
Hope I've provided the enough info and appreciate any form of help.
This is actually a pretty cool feature, i didn't even know it existed until I was looking for a solution to advertise a subnet (prefix in BGP talk), only if a certain condition existed. This is exactly what conditional advertisements does
j ai une question j ai achete un routeur cisco 887VA-k9 , je le configuré avec la configuration ci- dessous
si je le lier avec mon pc portable sur l un de ses ports directement ça marche toute est bien ( la connexion internet + m...
Attached policy provides CLI access to the Cisco 4G router over text messaging. Two files are in the attached .tar file:
2. PDF with instructions on how to load and use the .tcl file.