When doing a traceroute from VRFx on PE PE1 (ASR9K) to Prefixs belonging to the same VRF on PE2 I notice that for some destinations it reports one path and for other destinations it reports two paths.
Both PEs have two links to the MPLS core. It is supposed that packets with same source/destination go along the same path (per flow load-balancing) . So I don’t understand why for some destinations the traceroute reports two different paths. Any idea?
Example 1 - Reports only one path
PE1#traceroute vrf x 192.168.1.18 source 192.168.1.1
Tracing the route to 192.168.1.18
1 188.8.131.52 8 msec 8 msec 7 msec
2 192.168.1.18 12 msec * 12 msec
Example 2 - Reports two different paths (184.108.40.206 and 220.127.116.11 are two different uplinlink interfaces on the destination PE)
PE1#traceroute vrf x 192.168.1.22 source 192.168.1.1
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