For instance, a VPN prefix It is used to identify the correct next-hop The inner label is kept untouched by the P router. This router takes the forwarding decision solely based on labels. The VPN label is the same as in echo request 21 because both sides are customer A.
It contains two routes learned via BGP. It is the route Step 6 tunnel destination destination-address Example: Device config-if tunnel destination Was this Document Helpful?
Yes No Feedback. Enables privileged EXEC mode. Enters global configuration mode. Creates a tunnel interface and enters interface configuration mode. Assigns an IP address to the tunnel interface. Step 5. Returns to privileged EXEC mode. The number of paths supported are limited to 2 BGP multipaths. The maximum-paths command allows you to configure BGP to install multiple paths in the RIB for multipath load sharing.
BGP uses the best path algorithm to select a single multipath as the best path and advertise the best path to BGP peers. The number of paths of multipaths that can be configured is documented on the maximum-paths command reference page. Load balancing over the multipaths is performed by CEF. CEF load balancing is configured on a per-packet round robin or on a per session source and destination pair basis.
The number of multipaths is configured on a per VRF basis. Separate VRF multipath configurations are isolated by unique route distinguisher. Network 2 is a multihomed network that is connected to PE router 1 and PE router 2. Network 2 also has extranet VPN services configured with Network 1. P devices do not maintain any VPN routes. Security is provided in the following areas: At the edge of a provider network, ensuring packets that are received from a customer are placed on the correct VPN.
Flexible Addressing To make a VPN service more accessible, customers of a service provider can design their own addressing plan.
It provides the ability to address two fundamental VPN requirements: Predictable performance and policy implementation Support for multiple levels of service in an MPLS VPN Network traffic is classified and labeled at the edge of the network. Straightforward Migration For service providers to quickly deploy VPN services, use a straightforward migration path.
Identify the following to determine the number of devices and ports that you need: How many customers do you need to support? How many VPNs are needed per customer? How many virtual routing and forwarding instances are there for each VPN? Step 2 Identify the routing protocols in the core. Determine which routing protocols you need in the core network. Enter your password if prompted. Step 2 configure terminal Example: Device configure terminal Enters global configuration mode.
Step 3 vrf definition vrf-name Example: Device config vrf definition vrf1 Defines the virtual private network VPN routing instance by assigning a virtual routing and forwarding VRF name and enters VRF configuration mode. Step 4 rd route-distinguisher Example: Device config-vrf rd Creates routing and forwarding tables.
You can enter a route distinguisher RD in either of these formats: bit AS number:your bit number, for example, bit IP address:your bit number, for example, Step 7 exit Example: Device config-vrf exit Optional Exits to global configuration mode. Step 4 vrf forwarding vrf-name Example: Device config-if vrf forwarding vrf1 Associates a VRF with the specified interface or subinterface.
Procedure show ip vrf Displays the set of defined VRF instances and associated interfaces. Step 3 trace [ protocol ] [ destination ] Discovers the routes that packets take when traveling to their destination. Step 4 show ip route [ ip-address [ mask ] [ longer-prefixes ]] protocol [ process-id ]] [ list [ access-list-name access-list-number ] Displays the current state of the routing table. Step 2 show ip route vrf vrf-name [ prefix ] Displays the IP routing table that is associated with a virtual routing and forwarding VRF instance.
Was this Document Helpful? Yes No Feedback. Step 1. Identify the size of the network. Step 2. Identify the routing protocols in the core. Step 3. Step 4. Enables privileged EXEC mode. Enters global configuration mode.
Creates routing and forwarding tables. Step 5.
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