Hi, JunOS 19.1 brings support for the BGP graceful shutdown mechanism (RFC8326):
https://tools.ietf.org/html/rfc8326 https://www.juniper.net/documentation/en_US/junos/topics/reference/configuration-statement/graceful-shutdown-edit-protocols-bgp.html While you could always do this by hand I was happy to see it implemented in the platform because it might simplify policy handling. I tried it on QFX5100 but couldn't get it to work. While the sender part seems okay (set protocols bgp graceful-shutdown sender adds the community to all outgoing routes), the receiver part does not work. set protocols bgp graceful-shutdown receiver does nothing on my setup. I tried to specify it in every BGP group which did do nothing and I tried to explicitly set it to local-pref 0 which also does nothing. Support for the feature is advertised in the group overview: > show bgp group spines detail Group Type: External Local AS: 4200100001 Name: spines Index: 0 Flags: <Export Eval> Export: [ bgp-redist-direct bgp-redist-from-upstream deny-everything ] Options: <GracefulShutdownRcv> Holdtime: 0 Graceful Shutdown Receiver local-preference: 0 Total peers: 2 Established: 2 172.25.1.0+179 172.25.2.0+179 Route Queue Timer: unset Route Queue: empty Table inet.0 Active prefixes: 6 Received prefixes: 6 Accepted prefixes: 6 Suppressed due to damping: 0 Advertised prefixes: 2 But routes are unaffected: > show route 10.210.128.128/25 detail inet.0: 13 destinations, 16 routes (13 active, 0 holddown, 0 hidden) 10.210.128.128/25 (2 entries, 1 announced) *BGP Preference: 170/-101 Next hop type: Router, Next hop index: 0 Address: 0xba56a10 Next-hop reference count: 4 Source: 172.25.2.0 Next hop: 172.25.1.0 via et-0/0/48.0 Session Id: 0x0 Next hop: 172.25.2.0 via et-0/0/49.0, selected Session Id: 0x0 State: <Active Ext> Local AS: 4200100001 Peer AS: 4200100000 Age: 19:55 Validation State: unverified Task: BGP_4200100000.172.25.2.0 Announcement bits (3): 0-KRT 1-BGP_RT_Background 2-BGP_RT_Background AS path: 4200100000 4200100002 I Accepted Multipath Localpref: 100 Router ID: 172.25.255.2 BGP Preference: 170/-101 Next hop type: Router, Next hop index: 1739 Address: 0xba25c90 Next-hop reference count: 4 Source: 172.25.1.0 Next hop: 172.25.1.0 via et-0/0/48.0, selected Session Id: 0x0 State: <Ext Changed> Inactive reason: Active preferred Local AS: 4200100001 Peer AS: 4200100000 Age: 10:41 Validation State: unverified Task: BGP_4200100000.172.25.1.0 AS path: 4200100000 4200100002 I >>>>> Communities: graceful-shutdown Accepted MultipathContrib >>>>> Localpref: 100 Router ID: 172.25.255.1 Has anyone else tested this? Regards Sebastian -- GPG Key: 0x58A2D94A93A0B9CE (F4F6 B1A3 866B 26E9 450A 9D82 58A2 D94A 93A0 B9CE) 'Are you Death?' ... IT'S THE SCYTHE, ISN'T IT? PEOPLE ALWAYS NOTICE THE SCYTHE. -- Terry Pratchett, The Fifth Elephant _______________________________________________ juniper-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/juniper-nsp
