H3C Technologies H3C S7500E Series Switches - Manual (Page 15)

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PING 1.1.2.2: 56 data bytes, press CTRL_C to break
Reply from 1.1.2.2: bytes=56 Sequence=1 ttl=254 time=53 ms
Record Route:
1.1.2.1
1.1.2.2
1.1.1.2
1.1.1.1
Reply from 1.1.2.2: bytes=56 Sequence=2 ttl=254 time=1 ms
Record Route:
1.1.2.1
1.1.2.2
1.1.1.2
1.1.1.1
Reply from 1.1.2.2: bytes=56 Sequence=3 ttl=254 time=1 ms
Record Route:
1.1.2.1
1.1.2.2
1.1.1.2
1.1.1.1
Reply from 1.1.2.2: bytes=56 Sequence=4 ttl=254 time=1 ms
Record Route:
1.1.2.1
1.1.2.2
1.1.1.2
1.1.1.1
Reply from 1.1.2.2: bytes=56 Sequence=5 ttl=254 time=1 ms
Record Route:
1.1.2.1
1.1.2.2
1.1.1.2
1.1.1.1
--- 1.1.2.2 ping statistics ---
5 packet(s) transmitted
5 packet(s) received
0.00% packet loss
round-trip min/avg/max = 1/11/53 ms
The principle of ping –r is as shown in Figure 1-1 .
1) The source (Device A) sends an ICMP echo request with the RR option being empty to the
destination (Device C).
2) The intermediate device (Device B) adds the IP address (1.1.2.1) of its outbound interface to
the RR option of the ICMP echo request, and forwards the packet.
3) Upon receiving the request, the destination device copies the RR option in the request and
adds the IP address (1.1.2.2) of its outbound interface to the RR option. Then the destination
device sends an ICMP echo reply.
4) The intermediate device adds the IP address (1.1.1.2) of its outbound interface to the RR option
in the ICMP echo reply, and then forwards the reply.
5) Upon receiving the reply, the source device adds the IP address (1.1.1.1) of its inbound
interface to the RR option. Finally, you can get the detailed information of routes from Device A
to Device C: 1.1.1.1 <-> {1.1.1.2; 1.1.2.1} <-> 1.1.2.2.