Hello, colleagues. Help to solve following problem :
There is a diagram of switching on
Customers ->MX240--ldp lsp-->X670--ldp lsp-->X670--ldp lsp-->ldp lsp-->X670--ldp lsp-->MX480-->Internet
All Extreme X670 - 22.214.171.124 - intermediate LSR
MX240 - egress mpls lsr
MX480 - ingress mpls lsr
Between MX240 and MX480 bgp session is set .
Сustomer does traceroute :
traceroute to 126.96.36.199 (188.8.131.52), 30 hops max, 60 byte packets
1 10.10.10.1 (10.10.10.1) 0.327 ms 0.332 ms 0.315 ms
2 * * * here shall be first X670
3 * * * here shall be second X670
4 * * * here shall be third X670
To documentation it is written :
"In pipe TTL mode, the LSP is viewed as a point-to-point link between the ingress LSR and the egress LSR; intermediate LSRs in the MPLS network are not viewed as router hops from an IP TTL perspective. "
Why from X670 doesn't come ttl exceeded ? Why X670 generally is visible in trace ?