It also supports a new BGP community, 'LLGR_STALE', That stale information can be retained for a longer time across a Junos OS supportsĪ BGP capability called long-lived graceful restart capability so Restart imposes a 4095-second upper-bound limitation. Time for which 'stale' information can be retained-graceful Although the properties of BGP Graceful RestartĪre close to this desired requirement to preserve BGP informationįor a longer duration, several gaps exist, most notably in maximum To retain BGP data for a longer period when the BGP control planeįails for some reason. It was important to offer network operators the ability to choose In these cases, BGP data assumes a characteristic that is not in Examples include the use of BGP forĪutodiscovery (VPLS ) and filter programming (FLOWSPEC ). The second is the increasing use of BGPĪs a transport for data less closely associated with packet forwarding

Types of forwarding loops that can arise in hop-by-hop forwarding,Īnd thereby reduce one of the motivations for strong consistencyīetween forwarding elements. Such infrastructures eliminate the risk of some The first is the widespread adoption of tunneled forwarding infrastructures,įor example MPLS. This method of rapid removal of stale states to be modified and enhanced. Over a period of time, two contributing factors have caused The fast convergence functionality has been an attempt to rapidly

Using BGP Graceful Restart defined in RFC 4724, For this reason, the protocol was designed to remove stateĪdvertised by routers which went down (from a BGP perspective) as To converge toward the current state of the network as quickly as Of the 'correctness' is for each network element's forwarding state Historically, routing protocols and BGP, in particular, haveīeen designed with a focus on correctness, where a significant aspect

Junos OS supports the mechanism to preserve BGP routingĭetails for a longer period from a failed BGP peer than the durationįor which such routing information is maintained using the BGP graceful

Reset is not restart quote