ASBR1 ASBR2
-------- D ------- E --------
| |
| |
A -------- C F -------- B
DSLAM1 PE1 PE2 DSLAM2
| |
| |
-------- G ------- H --------
ASBR3 ASBR4
# lsp-trace ldp-bgp stitching
*A:Dut-A# oam lsp-trace prefix 10.20.1.6/32 detail downstream-map-
tlv ddmap
lsp-trace to 10.20.1.6/32: 0 hops min, 0 hops max, 108 byte packets
1 10.20.1.1 rtt=2.89ms rc=15(LabelSwitchedWithFecChange) rsc=1
DS 1: ipaddr=10.10.1.2 ifaddr=10.10.1.2 iftype=ipv4Numbered MRU=1496
label[1]=262143 protocol=3(LDP)
label[2]=262139 protocol=2(BGP)
fecchange[1]=POP fectype=LDP IPv4 prefix=10.20.1.6 remotepeer=0.0.0.0 (Unknown)
fecchange[2]=PUSH fectype=BGP IPv4 prefix=10.20.1.6 remotepeer=10.20.1.2
fecchange[3]=PUSH fectype=LDP IPv4 prefix=10.20.1.2 remotepeer=10.10.1.2
2 10.20.1.2 rtt=5.19ms rc=3(EgressRtr) rsc=2
2 10.20.1.2 rtt=5.66ms rc=8(DSRtrMatchLabel) rsc=1
DS 1: ipaddr=10.10.4.4 ifaddr=10.10.4.4 iftype=ipv4Numbered MRU=0
label[1]=262138 protocol=2(BGP)
3 10.20.1.4 rtt=6.53ms rc=15(LabelSwitchedWithFecChange) rsc=1
DS 1: ipaddr=10.10.6.5 ifaddr=10.10.6.5 iftype=ipv4Numbered MRU=1496
label[1]=262143 protocol=3(LDP)
label[2]=262138 protocol=2(BGP)
fecchange[1]=PUSH fectype=LDP IPv4 prefix=10.20.1.5 remotepeer=10.10.6.5
4 10.20.1.5 rtt=8.51ms rc=3(EgressRtr) rsc=2
4 10.20.1.5 rtt=8.45ms rc=15(LabelSwitchedWithFecChange) rsc=1
DS 1: ipaddr=10.10.10.6 ifaddr=10.10.10.6 iftype=ipv4Numbered MRU=1496
label[1]=262143 protocol=3(LDP)
fecchange[1]=POP fectype=BGP IPv4 prefix=10.20.1.6 remotepeer=0.0.0.0
(Unknown)
fecchange[2]=PUSH fectype=LDP IPv4 prefix=10.20.1.6 remotepeer=10.10.10.6
5 10.20.1.6 rtt=11.2ms rc=3(EgressRtr) rsc=1
*A:Dut-A# configure router ldp-
shortcut (to add ldp label on first hop but overall behavior is similar)
# 12.0R4 default behavior (we have routes back to the source)
*A:Dut-A# traceroute 10.20.1.6 detail wait 100
traceroute to 10.20.1.6, 30 hops max, 40 byte packets
1 1 10.10.2.1 (10.10.2.1) 3.47 ms
1 2 10.10.2.1 (10.10.2.1) 3.65 ms
1 3 10.10.2.1 (10.10.2.1) 3.46 ms
2 1 10.10.1.2 (10.10.1.2) 5.46 ms
2 2 10.10.1.2 (10.10.1.2) 5.83 ms
2 3 10.10.1.2 (10.10.1.2) 5.20 ms
3 1 10.10.4.4 (10.10.4.4) 8.55 ms
3 2 10.10.4.4 (10.10.4.4) 7.45 ms
3 3 10.10.4.4 (10.10.4.4) 7.29 ms
4 1 10.10.6.5 (10.10.6.5) 9.67 ms
4 2 10.10.6.5 (10.10.6.5) 10.1 ms
4 3 10.10.6.5 (10.10.6.5) 10.9 ms
5 1 10.20.1.6 (10.20.1.6) 11.5 ms
5 2 10.20.1.6 (10.20.1.6) 11.1 ms
5 3 10.20.1.6 (10.20.1.6) 11.4 ms
# Enable ICMP tunneling on PE and ASBR nodes.
*A:Dut-D# # configure router ttl-propagate label-route-local all *A:Dut-
C,D,E,F# configure router icmp-tunneling
*A:Dut-C# traceroute 10.20.1.6 detail wait 100
traceroute to 10.20.1.6, 30 hops max, 40 byte packets
1 1 10.10.1.1 (10.10.1.1) 11.8 ms
returned MPLS Label Stack Object
entry 1: MPLS Label = 262138, Exp = 7, TTL = 1, S = 1
1 2 10.10.1.1 (10.10.1.1) 12.5 ms
returned MPLS Label Stack Object
entry 1: MPLS Label = 262138, Exp = 7, TTL = 1, S = 1
1 3 10.10.1.1 (10.10.1.1) 12.9 ms
returned MPLS Label Stack Object
entry 1: MPLS Label = 262138, Exp = 7, TTL = 1, S = 1
2 1 10.10.4.2 (10.10.4.2) 13.0 ms
returned MPLS Label Stack Object
entry 1: MPLS Label = 262143, Exp = 7, TTL = 1, S = 0
entry 2: MPLS Label = 262139, Exp = 7, TTL = 1, S = 1
2 2 10.10.4.2 (10.10.4.2) 13.0 ms
returned MPLS Label Stack Object
entry 1: MPLS Label = 262143, Exp = 7, TTL = 1, S = 0
entry 2: MPLS Label = 262139, Exp = 7, TTL = 1, S = 1
2 3 10.10.4.2 (10.10.4.2) 12.8 ms
returned MPLS Label Stack Object
entry 1: MPLS Label = 262143, Exp = 7, TTL = 1, S = 0
entry 2: MPLS Label = 262139, Exp = 7, TTL = 1, S = 1
3 1 10.10.6.4 (10.10.6.4) 10.1 ms
returned MPLS Label Stack Object
entry 1: MPLS Label = 262138, Exp = 7, TTL = 1, S = 1
3 2 10.10.6.4 (10.10.6.4) 11.1 ms
returned MPLS Label Stack Object
entry 1: MPLS Label = 262138, Exp = 7, TTL = 1, S = 1
3 3 10.10.6.4 (10.10.6.4) 9.70 ms
returned MPLS Label Stack Object
entry 1: MPLS Label = 262138, Exp = 7, TTL = 1, S = 1
4 1 10.10.10.5 (10.10.10.5) 12.5 ms
returned MPLS Label Stack Object
entry 1: MPLS Label = 262143, Exp = 7, TTL = 255, S = 0
entry 2: MPLS Label = 262138, Exp = 7, TTL = 1, S = 1
4 2 10.10.10.5 (10.10.10.5) 11.9 ms
returned MPLS Label Stack Object
entry 1: MPLS Label = 262143, Exp = 7, TTL = 255, S = 0
entry 2: MPLS Label = 262138, Exp = 7, TTL = 1, S = 1
4 3 10.10.10.5 (10.10.10.5) 11.8 ms
returned MPLS Label Stack Object
entry 1: MPLS Label = 262143, Exp = 7, TTL = 255, S = 0
entry 2: MPLS Label = 262138, Exp = 7, TTL = 1, S = 1
5 1 10.20.1.6 (10.20.1.6) 12.2 ms
5 2 10.20.1.6 (10.20.1.6) 12.5 ms
5 3 10.20.1.6 (10.20.1.6) 13.2 ms
# With lsr-label-route all on all LSRs (only needed on Dut-E) *A:Dut-
E# configure router ttl-propagate lsr-label-route all
*A:Dut-
A# traceroute 10.20.1.6 detail wait 100 traceroute to 10.20.1.6, 30 hops max, 40 byt
e packets
1 1 10.10.1.1 (10.10.1.1) 12.4 ms
returned MPLS Label Stack Object
entry 1: MPLS Label = 262138, Exp = 7, TTL = 1, S = 1
1 2 10.10.1.1 (10.10.1.1) 11.9 ms
returned MPLS Label Stack Object
entry 1: MPLS Label = 262138, Exp = 7, TTL = 1, S = 1
1 3 10.10.1.1 (10.10.1.1) 12.7 ms
returned MPLS Label Stack Object
entry 1: MPLS Label = 262138, Exp = 7, TTL = 1, S = 1
2 1 10.10.4.2 (10.10.4.2) 11.6 ms
returned MPLS Label Stack Object
entry 1: MPLS Label = 262143, Exp = 7, TTL = 1, S = 0
entry 2: MPLS Label = 262139, Exp = 7, TTL = 1, S = 1
2 2 10.10.4.2 (10.10.4.2) 13.5 ms
returned MPLS Label Stack Object
entry 1: MPLS Label = 262143, Exp = 7, TTL = 1, S = 0
entry 2: MPLS Label = 262139, Exp = 7, TTL = 1, S = 1
2 3 10.10.4.2 (10.10.4.2) 11.9 ms
returned MPLS Label Stack Object
entry 1: MPLS Label = 262143, Exp = 7, TTL = 1, S = 0
entry 2: MPLS Label = 262139, Exp = 7, TTL = 1, S = 1
3 1 10.10.6.4 (10.10.6.4) 9.21 ms
returned MPLS Label Stack Object
entry 1: MPLS Label = 262138, Exp = 7, TTL = 1, S = 1
3 2 10.10.6.4 (10.10.6.4) 9.58 ms
returned MPLS Label Stack Object
entry 1: MPLS Label = 262138, Exp = 7, TTL = 1, S = 1
3 3 10.10.6.4 (10.10.6.4) 9.38 ms
returned MPLS Label Stack Object
entry 1: MPLS Label = 262138, Exp = 7, TTL = 1, S = 1
4 1 10.10.10.5 (10.10.10.5) 12.2 ms
returned MPLS Label Stack Object
entry 1: MPLS Label = 262143, Exp = 7, TTL = 1, S = 0
entry 2: MPLS Label = 262138, Exp = 7, TTL = 1, S = 1
4 2 10.10.10.5 (10.10.10.5) 11.5 ms
returned MPLS Label Stack Object
entry 1: MPLS Label = 262143, Exp = 7, TTL = 1, S = 0
entry 2: MPLS Label = 262138, Exp = 7, TTL = 1, S = 1
4 3 10.10.10.5 (10.10.10.5) 11.5 ms
returned MPLS Label Stack Object
entry 1: MPLS Label = 262143, Exp = 7, TTL = 1, S = 0
entry 2: MPLS Label = 262138, Exp = 7, TTL = 1, S = 1
5 1 10.20.1.6 (10.20.1.6) 11.9 ms
5 2 10.20.1.6 (10.20.1.6) 12.2 ms
5 3 10.20.1.6 (10.20.1.6) 13.7 ms