Hey! I have a pair of MX104. Each one is receiving a full view and a default through an external BGP session. They share an iBGP session. They redistribute the default in OSPF (with a higher metric when the default comes through the iBGP session). Nothing fancy.
If I shut the upstream port of one of the MX, the session goes down and the RIB is quickly updated. Unfortunately, the KRT is quite slow to be updated. A "show krt queue" shows there are many deletion/addition/changes queued and they take about 2 minutes to be processed. Unfortunately, during this time, I have a lot of more specific routes still pointing to a non-existant hop: [email protected]# run show route 138.231.136.1 extensive table public.inet.0 | no-more public.inet.0: 571546 destinations, 996364 routes (425305 active, 321183 holddown, 571058 hidden) 138.231.0.0/16 (2 entries, 1 announced) TSI: KRT queued (pending) change 138.231.0.0/16 -> {1.1.1.1}=>{indirect(1048578)} Page 0 idx 1, (group v4-IBGP type Internal) Type 3 val 22b9ccb8 (grp rto) Advertised metrics: No metrics (Queued) Enqueued metrics 1: (for peers 00000001 3.3.3.3) Flags: Nexthop Change Nexthop: Self MED: 10 Localpref: 100 AS path: [61098] 25091 2200 2426 I Communities: 25091:22413 25091:24115 [...] Path 138.231.0.0 from 159.100.255.231 Vector len 4. Val: 1 *BGP Preference: 140/-101 Next hop type: Indirect Address: 0x177743a0 Next-hop reference count: 877603 Source: 3.3.3.3 Next hop type: Router, Next hop index: 1048577 Next hop: 2.2.2.2 via xe-2/0/3.100 Session Id: 0x18 Next hop: 2.2.2.0 via xe-2/0/2.100, selected Session Id: 0x17 Protocol next hop: 3.3.3.3 Indirect next hop: 0x19ec4b2c 1048578 INH Session ID: 0x1b State: <Active Int Ext> Age: 16:57 Metric: 10 Metric2: 0 Validation State: unverified Task: BGP_61098_61098.3.3.3.3+50640 Announcement bits (3): 2-KRT 3-BGP_RT_Background 4-Resolve tree 2 AS path: 8218 2200 2426 I Communities: 8218:102 8218:20000 8218:20110 Accepted Localpref: 100 Router ID: 3.3.3.3 Indirect next hops: 1 Protocol next hop: 3.3.3.3 Indirect next hop: 0x19ec4b2c 1048578 INH Session ID: 0x1b Indirect path forwarding next hops: 2 Next hop type: Router Next hop: 2.2.2.2 via xe-2/0/3.100 Session Id: 0x18 Next hop: 2.2.2.0 via xe-2/0/2.100 Session Id: 0x17 3.3.3.3/32 Originating RIB: public.inet.0 Node path count: 1 Forwarding nexthops: 2 Nexthop: 2.2.2.2 via xe-2/0/3.100 So, I have three questions: Is it expected for a route to be flagged "active" while it is still queued to KRT? Is there a way to delete those invalid routes in a more speedier manner to let packets use the default route during the convergence time? Is there some way to not advertise the default route in OSPF during the convergence time? Like a criteria: don't advertise this route when the KRT queue has 1000+ elements and until it reaches 0 (to avoid flapping). I am running 13.3R8.7. Thanks! -- Treat end of file conditions in a uniform manner. - The Elements of Programming Style (Kernighan & Plauger) _______________________________________________ juniper-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/juniper-nsp
