Filtering IPv6 routes in BGP is similar to IPv4 filtering.. There are 3 methods we can use: Prefix-list; Filter-list; Route-map; Each of these can be applied in- or outbound. BGP Basics • Runs over TCP - port 179 0 BGP route-map cache entries using 0 bytes of memory! 0 BGP filter-list cache entries using 0 bytes of memory! BGP using 1795 total bytes of memory! BGP activity 7/0 prefixes, 14/0 paths, scan interval 60 secs! Once a route filter resource is defined and attached to an ExpressRoute circuit, all prefixes that map to the BGP community values are advertised to your network. To be able to attach route filters with Office 365 services on them, you must have authorization to consume Office 365 services through ExpressRoute. BGP Tutorial Philip Smith APRICOT 2004, Kuala Lumpur February 2004. filter-lists to filter ASNs route-maps to apply policy Loopback is OSPF and BGP router id Used for iBGP and route origination Tutorial: Options for Blackhole and Discard Routing Joseph M. Soricelli Wayne Gustavus NANOG 32, Reston, Virginia routing policy or a route map attached to the BGP Use a route-filter or access list to locate individual Filtering Routes in BGP using Route-maps and Prefix-list Order of preference of attributes in BGP The order of preference varies based on whether the attributes are applied for inbound updates or outbound updates. BGP Tutorial John S. Graham . What's In Store? • Routing Architectures • Never redistribute routes from BGP into the IGP . Best Route Selection Use route maps to redistribute 1. Prefixes learned from an IGP 2. CiscoNET.com is a large collection of IT networking knowledge, tips, configurations and tutorial videos. Troubleshooting portal Here is three way to filter routes / prefixes in BGP and examples . Distribute-list filtering; Route-map filtering neighbor 1.1.1.1 route-map CiscoNET out! ip In order to filter incoming BGP routing update, use route-map. Example: Step 1) Make a access-lis