What is non stop routing in Juniper?

What is non stop routing in Juniper?

Nonstop active routing (NSR) uses the same infrastructure as graceful Routing Engine switchover (GRES) to preserve interface and kernel information. However, NSR also saves routing protocol information by running the routing protocol process (rpd) on the backup Routing Engine.

What is non stop routing?

Nonstop active routing (NSR) provides a mechanism for transparent switchover of the Routing Engines without necessitating restart of supported routing protocols. Both Routing Engines are fully active in processing protocol sessions, and so each can take over for the other. The switchover is transparent to neighbors.

What is Juniper issu?

Product and Release Support An in-service software upgrade (ISSU) enables you to upgrade between two different Junos OS releases with minimal disruption on the control plane and with minimal disruption of traffic.

What is non stop forwarding?

Cisco Nonstop Forwarding (NSF) works with the Stateful Switchover (SSO) feature to minimize the amount of time a network is unavailable to users following a switchover. The main objective of NSF SSO is to continue forwarding IP packets following a Route Processor (RP) switchover.

What is NSR in BGP?

To use BGP nonstop routing (NSR), the system must have a minimum of two MPUs. NSR ensures nonstop services when BGP has redundant processes on multiple MPUs. In contrast to GR, NSR does not require a neighbor device to recover routing information.

Which three actions are required to perform a unified in-service?

Question 35: Which three actions are required to perform a unified in-service software upgrade (ISSU)? (Choose three.)

  • Issue the request system software in-service-upgrade command on the master RE.
  • Issue the request system software in-service-upgrade command on the backup RE.

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 helps network administrators avoid a network outage when performing a software upgrade. The images are upgraded in install mode wherein each package is upgraded individually.

What is BGP graceful restart NSR and NSF?

Graceful Restart and Non Stop Routing allows for the forwarding of data packets to continue along known routes. By using Graceful Restart routing protocol information is being restored while using Non Stop Routing, routing protocol information is being refreshed. BGP Graceful Restart for NSF.

What are two functions of the PFE choose two?

The PFE is the central processing component of the forwarding plane. The PFE uses Layer 2 and Layer 3 forwarding tables to forward traffic toward its destination. The PFE implements various services such as policing, stateless firewall filtering, and class of service.