What does it mean that IP Routing is NSF aware?

What does it mean that IP Routing is NSF aware?

non-stop forwarding enabled
IP Routing is NSF aware means that in your switch/router you have non-stop forwarding enabled, which prevents any disruption in traffic even in case of a reload as it segregates the control plane with the data plane. It uses CEF to update the linecards about the FIB entries, which have the packet forwarding decision.

What is NSF-capable?

NSF-capability: A device is NSF-capable if it is configured to support NSF; it rebuilds routing information from NSF-aware or NSF-capable neighbors. NSF works with SSO to minimize the amount of time that a Layer 3 network is unavailable following an active device election by continuing to forward IP packets.

What type of routing is OSPF?

The OSPF (Open Shortest Path First) protocol is one of a family of IP Routing protocols, and is an Interior Gateway Protocol (IGP) for the Internet, used to distribute IP routing information throughout a single Autonomous System (AS) in an IP network.

What is Cisco NSF?

Cisco Nonstop Forwarding (NSF) with Stateful Switchover (SSO) provides increased network service availability and protection against unplanned downtime due to hardware or software problems. Cisco NSF/SSO evolved from a series of progressive enhancements to reduce the impact of specific network outages.

What does show ip route do?

On a Cisco router, the show ip route command is used to display the IPv4 routing table of a router. A router provides additional route information, including how the route was learned, how long the route has been in the table, and which specific interface to use to get to a predefined destination.

What is NSR in networking?

There are number of terms we use in today’s High Availability Network like NSF (Non-Stop Forwarding), GR (Graceful Restart) and NSR (Non-Stop Routing). The FIB is given to the forwarding plane, which is then responsible for actual packet forwarding through the router.

What is Lisp Cisco?

LISP (Location Identifier Separation Protocol) is a routing and addressing architecture developed by Cisco Systems. Each node on the network has one Endpoint Identifier but may have multiple and variable Routing Locators. The protocol provides a mapping service between them.

What do you know about routing?

Routing is the process of selecting a path for traffic in a network or between or across multiple networks. Broadly, routing is performed in many types of networks, including circuit-switched networks, such as the public switched telephone network (PSTN), and computer networks, such as the Internet.

Is OSPF a dynamic routing protocol?

OSPF is an interior gateway protocol (IGP) for routing Internet Protocol (IP) packets within a single routing domain, such as an autonomous system. This provides a dynamic process of traffic load balancing between routes of equal cost.

What is Cisco issu?

ISSU is a process that upgrades an image to another image on a device while the network continues to forward packets. ISSU supports upgrade and rollback of software. It can be performed either in a single step, or in three-steps. Cisco StackWise Virtual solution supports ISSU.

What is SSO and NSF?

NSF works with SSO to minimize the amount of time that a network is unavailable to its users following a switchover. The main purpose of NSF is to continue forwarding IP packets following a supervisor engine switchover.

What is NSF aware IP routing?

Do you see any routes, any routing protocols? IP Routing is NSF aware means that in your switch/router you have non-stop forwarding enabled, which prevents any disruption in traffic even in case of a reload as it segregates the control plane with the data plane.

What is the OSPF nonstop forwarding awareness feature?

The OSPF Nonstop Forwarding (NSF) Awareness feature allows customer premise equipment (CPE) routers that are NSF-aware to help NSF-capable routers perform nonstop forwarding of packets. The awareness feature is part of the software code; it need not be configured.

What is NSF switchover in OSPF?

When an OSPF nonstop forwarding (NSF) router performs a route processor (RP) switchover, it notifies its neighbors, via a special Hello packet, of such action and requests that each neighbor help resynchronize the Link State Database.

How does a device that is NSF-capable work?

A device that is NSF-capable has been configured to support NSF; therefore, the device rebuilds routing information from NSF-aware or NSF-capable neighbors. Each protocol depends on CEF to continue forwarding packets during switchover while the routing protocols rebuild the routing information base (RIB) tables.