Routing

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  • 1.  no route to host

    Posted 06-21-2022 11:42
    I have the following:
    root@LS-6# run show route 172.30.40.21 table P3-2.inet.0

P3-2.inet.0: 17 destinations, 17 routes (17 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both

172.30.40.21/32    *[BGP/170] 00:21:13, localpref 100, from 172.30.5.41
                      AS path: 54591 64600 54591 64600 I, validation-state: unverified
                    > to 192.168.0.5 via ge-0/0/0.302, Push 18, Push 301056(top)

[edit]
root@LS-6# run ping 172.30.40.21 routing-instance P3-2
PING 172.30.40.21 (172.30.40.21): 56 data bytes
ping: sendto: No route to host
ping: sendto: No route to host
^C
--- 172.30.40.21 ping statistics ---
2 packets transmitted, 0 packets received, 100% packet loss

[edit]
root@LS-6#

root@LS-6# run show route 172.30.40.21 table P3-2.inet.0 extensive

P3-2.inet.0: 17 destinations, 17 routes (17 active, 0 holddown, 0 hidden)
172.30.40.21/32 (1 entry, 1 announced)
TSI:
KRT queued (deferred) add
  172.30.40.21/32 -> {indirect(-)}
Page 0 idx 0, (group ce type External) Type 1 val 0x955b528 (adv_entry)
   Advertised metrics:
     Nexthop: Self
     AS path: [43208.365] 54591 43208.365 54591 43208.365 I
     Communities: target:43208:200 target:54591:100 target:54591:111 src-as:54591:0 rt-import:172.30.5.3:5 rt-import:172.30.5.7:6
Path 172.30.40.21 from 172.30.5.41 Vector len 4.  Val: 0
        *BGP    Preference: 170/-101
                Route Distinguisher: 172.30.5.7:7
                Next hop type: Indirect
                Address: 0x940f298
                Next-hop reference count: 36
                Source: 172.30.5.41
                Next hop type: Router
                Next hop: 192.168.0.5 via ge-0/0/0.302, selected
                Label operation: Push 18, Push 301056(top)
                Label TTL action: prop-ttl, prop-ttl(top)
                Load balance label: Label 18: None; Label 301056: None;
                Session Id: 0x0
                Protocol next hop: 172.30.5.7
                Label operation: Push 18
                Label TTL action: prop-ttl
                Load balance label: Label 18: None;
                Indirect next hop: 0x9754000 - INH Session ID: 0x0
                State: <Secondary Active Ext ProtectionCand>
                Local AS: 43208.365 Peer AS: 54591
                Age: 25:10      Metric2: 20
                Validation State: unverified
                Task: BGP_54591.172.30.5.41+59140
                Announcement bits (2): 0-KRT 2-BGP_RT_Background
                AS path: 54591 64600 54591 64600 I
                Communities: target:43208:200 target:54591:100 target:54591:111 src-as:54591:0 rt-import:172.30.5.3:5 rt-import:172.30.5.7:6
                Import Accepted
                VPN Label: 18
                Localpref: 100
                Router ID: 172.30.5.41
                Primary Routing Table bgp.l3vpn.0
                Indirect next hops: 1
                        Protocol next hop: 172.30.5.7 Metric: 20
                        Label operation: Push 18
                        Label TTL action: prop-ttl
                        Load balance label: Label 18: None;
                        Indirect next hop: 0x9754000 - INH Session ID: 0x0
                        Indirect path forwarding next hops: 1
                                Next hop type: Router
                                Next hop: 192.168.0.5 via ge-0/0/0.302
                                Session Id: 0x0
                        172.30.5.7/32 Originating RIB: inet.3
                          Metric: 20                      Node path count: 1
                          Forwarding nexthops: 1
                                Nexthop: 192.168.0.5 via ge-0/0/0.302

[edit]
root@LS-6#
​
    What might be the cause for "No route to host" ?
    What does "KRT queued (deferred) add" mean ?

    thanks !!!


  • 2.  RE: no route to host

    Posted 06-21-2022 17:45
    I figured it out after I checked the forwarding table. The label was missing because I forgot to enable mpls on the inter-provider interface.

    thanks !!
    Original Message