What is set IP next hop?

A next hop IP is the IP address of a adjacent router or device with layer-2 connectivity to the managed device. If the managed device uses policy-based routing to forwards packets to a next hop device and that device becomes unreachable, the packets matching the policy will not reach their destination.

How do I find my next hop address?

To determine the next hop for a given packet, the router will compare it to each of the entries in the routing table (by anding it with the netmask and comparing it to the network address). It will forward the packet to the first next-hop that matches.

How do I set the default gateway to the next hop router?

Perform these steps to configure a default route.

Enter global configuration mode. device# configure terminal.
Enter 0.0. 0.0 0.0.
(Optional) Enable the default network route for static route next-hop resolution.
(Optional) Configure next-hop recursive lookup to resolve the next-hop gateway.

What is a recursive next hop?

The PBR Recursive Next Hop feature enhances route maps to enable configuration of a recursive next-hop IP address that is used by policy-based routing (PBR). The recursive next-hop IP address is installed in the routing table and can be a subnet that is not directly connected.

What is default next hop?

The Policy-Based Routing Default Next-Hop Route feature introduces the ability for packets that are forwarded as a result of the set ip default next-hop command to be switched at the hardware level.

What is BGP next hop?

The BGP nexthop attribute is the next hop IP address that is going to be used to reach a certain destination. For EBGP, the next hop is always the IP address of the neighbor specified in the neighbor command.

How do I set a static IPv6 route?

To configure a basic IPv6 static route, perform these steps.

Enter global configuration mode. device# configure terminal.
Designate the route destination as an IPv6 address in hexadecimal with 16-bit values between colons, as specified in RFC 2373, and include the address prefix length preceded by a slash.

What is recursive route?

recursive routing occurs when a route either static route or dynamically learned has a next-hop that is not directly connected to the local router.

What is BGP recursive route?

BGP recursive route lookup allows to use the next-hop attribute to find a path to a network that the IGP is aware of. Without the recursive lookup the Border Gateway Protocol would not work, because BGP is built on top of recursive routing.

How do I set up policy-based routing?

How to Configure PBR (Policy-Based Routing)?

Step1: Configure ACLs. Permit statement in ACL is what will be matched.
Step2: Configure route map instances.
Step3: Configure match commands.
Step4: Configure set commands.
Step5: Configure PBR on the interface.
Step6: (Optional) Configure local PBR.

How does the set IP default next-hop command work?

The set ip default next-hop command verifies the existence of the destination IP address in the routing table, and…. if the destination IP address exists, the command does not policy route the packet, but forwards the packet based on the routing table.

How to force Linus to verify the availability of the next-hop address?

To force Linus to verify the availability of the next-hop address before attempting to forward the packet, use the command set ip next-hop verify-availability. Linus will search its CDP neighbors table to verify that the next-hop address is listed. If it is not, the policy is rejected and the packet is forwarded normally.

How do I reference extended IP access-lists in a route map?

Policy route maps can reference extended IP access-lists to specify a source and destination address pair to match, as shown in this configuration. Route map Sally is again used, except the match statements now reference access lists 101 and 102. Example 14-13 shows the results.

How are packets passed sequentially in a route map?

A packet or route is passed sequentially through route map statements. If a match is made, any set statements are executed and the permit or deny action is executed. As with access lists, processing stops when a match is made and the specified action is executed; the route or packet is not passed to subsequent statements.