• Destination port• TCP FlagsAfter a redirect-list is applied to an interface, all traffic passing through it is subjected to the rules defined in the redirect-list.The traffic is forwarded based on the following:• Next-hop addresses are verified. If the specified next hop is reachable, the traffic is forwarded to the specified next-hop.• If the specified next-hops are not reachable, the normal routing table is used to forward the traffic.• Dell Networking OS supports multiple next-hop entries in the redirect lists.• Redirect-lists are applied at Ingress.PBR with Redirect-to-Tunnel Option:The user can provide a tunnel id for a redirect rule. In this case, the resolved next hop would be the tunnel interface IP. The qualifiersof the rule would be pertaining to the inner IP details. For next hop to be a tunnel interface user needs to provide tunnel idmandatory. Instead if user provides the tunnel destination IP as next hop, that would be treated as IPv4 next hop and not tunnel nexthop.PBR with Multiple Tacking Option:Policy based routing with multiple tracking option extends and introduces the capabilities of object tracking to verify the next hop IPaddress before forwarding the traffic to the next hop. The verification method is made transparent to the user. The multiple trackingoptions feature is most suitable for routers which have multiple devices as the next hop (primarily indirect next-hops and/or TunnelInterfaces in this case). It allows you to backup Indirect Next-hop with another, choose the specific Indirect Next-hop and/or TunnelInterface which is available by sending ICMP pings to verify reach ability and/or check the Tunnel Interface UP or DOWN status, andthen route traffic out to that next-hop and/or Tunnel InterfaceImplementing Policy-based Routing with Dell Networking OS• Non-contiguous bitmasks for PBR• Hot-Lock PBRNon-Contiguous Bitmasks for PBRNon-contiguous bitmasks for PBR allows more granular and flexible control over routing policies. Network addresses that are in themiddle of a subnet can be included or excluded. Specific bitmasks can be entered using the dotted decimal format.Dell#show ip redirect-listIP redirect-list rcl0:Defined as:seq 5 permit ip 200.200.200.200 200.200.200.200 199.199.199.199 199.199.199.199seq 10 redirect 1.1.1.2 tcp 234.224.234.234 255.234.234.234 222.222.222.222/24seq 40 ack, Next-hop reachable(via Te 8/1)Applied interfaces:Te 8/2Hot-Lock PBRIngress and egress Hot Lock PBR allows you to add or delete new rules into an existing policy (already written into content addressmemory [CAM]) without disruption to traffic flow. Existing entries in CAM are adjusted to accommodate the new entries. Hot LockPBR is enabled by default.Configuration Task List for Policy-based RoutingTo enable the PBR:• Create a Redirect List• Create a Rule for a Redirect-listPolicy-based Routing (PBR) 627
