* Vincent Bernat <ber...@luffy.cx> [2018-03-28 16:26]: > Hey! > > I am trying to setup a Juniper QFX5100 as a VTEP with a very classic > setup. Everything works as expected, but the setup is only using one > possible path from the underlay network. > > I have the route to the other VTEP like this: > > # run show route 10.16.39.3 > > inet.0: 240 destinations, 1808 routes (240 active, 0 holddown, 0 hidden) > + = Active Route, - = Last Active, * = Both > > 10.16.39.3/32 *[BGP/140] 00:38:24, localpref 500, from 10.64.0.5 > AS path: I, validation-state: unverified > to 10.64.0.23 via xe-0/0/46.181 > > to 10.64.128.23 via xe-0/0/47.183
Can you do a 'run show route 10.16.39.3 extensive'? For the record this work on JunOS 17.3 here (ISIS as underlay): Bridging domain: EVPN-TEST-1.evpn-vxlan [Index 7] VPLS: Enabled protocols: Bridging, ACKed by all peers, EVPN VXLAN, Destination: 3c:8a:b0:db:28:83/48 Learn VLAN: 0 Route type: user Route reference: 0 Route interface-index: 558 Multicast RPF nh index: 0 P2mpidx: 0 IFL generation: 136598 Epoch: 0 Sequence Number: 0 Learn Mask: 0x4000000000000000010000000000000000000000 L2 Flags: control_dyn Flags: sent to PFE Nexthop: Next-hop type: composite Index: 1723 Reference: 509 Next-hop type: indirect Index: 131073 Reference: 3 Next-hop type: unilist Index: 131070 Reference: 3 Nexthop: 172.17.1.0 Next-hop type: unicast Index: 1721 Reference: 6 Next-hop interface: et-0/0/48.0 Weight: 0x1 Nexthop: 172.17.2.0 Next-hop type: unicast Index: 1722 Reference: 6 Next-hop interface: et-0/0/49.0 Weight: 0x1 One thing we discovered is that QFX5100 can only loadbalance in the underlay (ECMP for the VTEP IP address) but not in the overlay for ESIs. When you have an ESI that is reachable through two VTEPs, only one will be used for forwarding. If that is a problem for you in practice depends on where you attach stuff. If you have something attached to the Spines (for example L3 to external) this might hit you performance-wise. It seems QFX5100 will do some sort of load-balancing for Destination-MACs per ESI (reach MAC-A trough VTEP 1, reach MAC-B trough VTEP 2) but I haven't tested that. QFX10k on the other hand will install multiple next-hops for ESIs. BTW: We're also seeing problems with third-party optics in JunOS 17.3 on QFX5k. CRC errors and problems with interfaces not coming up instantly. Regards Sebastian -- GPG Key: 0x93A0B9CE (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 juniper-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/juniper-nsp