ex8208vc-虚拟路由实例.docxVIP

[EX] Filter Based Forwarding (FBF)/Policy Based Routing (PBR) on EX-8200 VC with virtual-router as the routing-instance type  HYPERLINK /InfoCenter/index?page=contentid=KB23551smlogin=true ?[KB23551] Show KB Properties SUMMARY: This article provides information on how to setup filter based forwarding (FBF) or Cisco policy based routing (PBR) with RVIs on EX8200 VC. PROBLEM OR GOAL: ?When a router receives a packet, it normally decides where to forward it, based on the destination address in the packet; which is then used to look up an entry in a routing table. However, in certain cases, there may be a need to forward the packet based on other criteria.?For example, a network administrator might want to forward a packet based on the source address. This permits routing of packets, which originate from different sources to different networks, even when the destinations are the same and can be useful when interconnecting several private networks. CAUSE: SOLUTION: Topology: As per the above topology,?vlan.8?and?vlan.9?are the server VLANs;?vlan.2,?vlan.4, and?vlan.5?are respectively in the?R1,R4, and?R2?virtual-router?routing-instance type.?Configuration: Create VLANs, RVIs, and assign the respective physical interfaces to the VLANs: set vlans vlan8 vlan-id 8set vlans vlan8 l3-interface vlan.8set interfaces xe-7/0/6 unit 0 family ethernet-switching vlan members vlan8set interfaces vlan unit 8 family inet address /24set vlans vlan9 vlan-id 9set vlans vlan9 l3-interface vlan.9set interfaces xe-27/0/7 unit 0 family ethernet-switching vlan members vlan9set interfaces vlan unit 9 family inet filter input vlan9set interfaces vlan unit 9 family inet address /24set vlans vlan2 vlan-id 2set vlans vlan2 l3-interface vlan.2set interfaces ge-2/0/8 unit 0 family ethernet-switching vlan members vlan2set interfaces vlan unit 2 family inet address /24set vlans vlan4 vlan-id 4set vlans vlan4 l3-interface vlan.4set interfaces ge-2/0/14 unit 0 family eth