Conti vity 251 ABOT D eployment Version 1.0 April 26, 20043. Contivity C251 Deployment ExampleCompany ABC in NA has one small corporate central office and five remote branch offices. Theyplan to build a VPN (ABC VPN) using ISP Internet services and Nortel Contivity Gateways. TheABC VPN will allow remote branch offices to access to the private servers in headquarter CO withlow cost of maintenance and high security.Note, the configurations documented in this example were successfully tested in live network.3.1 ABC VPN Deployment Tasks• Network planning• network topology draw• order equipments and services and obtain information from ISP• Setup CO LAB• Configure Contivity gateway C1100• Pre-build five BO-config-files in CO• Send “startup” instructions to each BO• Deployment ABOT, coordinate with BO• Download config files from CO to BO3.2 Network planning- Network topology: hub-spoke, 1x C1100 gateway, 6xC251 Annex-A- Connectivity C251: configure one active ABOT and one inactive Client tunnel per C251- BO IP address: 192.168.x.0/24, for private LAN and 192.168.x.1 for C251 management- Initiator ID structure: office#-areacode-phone#- static IP from ISP: 24.1.61.69 for Contivity public Interface, and default gateway: 24.1.48.1- IP-pool: 172.16.55.1-172.16.55.10 for C251 hard client access- Software level: C1100 V04_80.124; C251 VE251_2.1.0.0.007 (V2.1)