WSM User Guide - WatchGuard Technologies

Using BGP2 In the New Policy Properties window, configure the policy to allow traffic from the IP or networkaddress of the router using OSPF to the IP addresses 224.0.0.5 and 224.0.0.6. Click OK.Using BGPNoteSupport for this protocol is available only in Fireware® Pro.Border Gateway Protocol (BGP) is a scalable dynamic routing protocol used by groups of routers to sharerouting information. BGP is the routing protocol used on the Internet. BGP uses route parameters or“attributes” to define routing policies and create a stable routing environment. BGP allows you to advertisemore than one path to and from the Internet to your network and resources. This gives you redundantpaths and can increase your uptime.Hosts using BGP use TCP to send updated routing table information when one host finds a change. Thehost sends only the part of the routing table that has the change. BGP uses classless interdomain routing(CIDR) to reduce the size of the Internet routing tables. The size of the BGP routing table in Fireware®Pro is set at 32K.The size of the typical WatchGuard® customer wide area network (WAN) is best suited for OSPF dynamicrouting. A WAN can also use external border gateway protocol (EBGP) when more than one gateway tothe Internet is available. EBGP allows you to take full advantage of the redundancy possible with a multihomednetwork.To participate in EBGP with an ISP you must have an autonomous system number (ASN). You must getan ASN from one of the regional registries in the table below. After you are assigned your own ASN youmust contact each ISP to get their AS numbers and other necessary information.User Guide 337