mpls1网卡
15: lo2: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN group default qlen 1000 link/ether 62:0c:90:5d:08:bd brd ff:ff:ff:ff:ff:ff inet 5.5.5.5/32 scope global lo2 valid_lft forever preferred_lft forever root@mpls1:~# ip a 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: enp1s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000 link/ether 52:54:00:e5:30:19 brd ff:ff:ff:ff:ff:ff inet 192.168.122.199/24 brd 192.168.122.255 scope global enp1s0 valid_lft forever preferred_lft forever inet6 fe80::5054:ff:fee5:3019/64 scope link valid_lft forever preferred_lft forever 3: enp7s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000 link/ether 52:54:00:d9:52:82 brd ff:ff:ff:ff:ff:ff inet 192.168.1.3/24 scope global enp7s0 valid_lft forever preferred_lft forever 4: lo1: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN group default qlen 1000 link/ether 5a:0a:49:19:5c:d1 brd ff:ff:ff:ff:ff:ff inet 3.3.3.3/32 scope global lo1 valid_lft forever preferred_lft forever
root@mpls1:~# vtysh Hello, this is FRRouting (version 7.3.1). Copyright 1996-2005 Kunihiro Ishiguro, et al. mpls1# sh run Building configuration... Current configuration: ! frr version 7.3.1 frr defaults traditional hostname mpls1 log syslog informational service integrated-vtysh-config ! interface enp1s0 shutdown ! router ospf ospf router-id 192.168.122.198 redistribute connected redistribute static network 3.3.3.3/32 area 0 network 5.5.5.5/32 area 0 network 192.168.1.0/24 area 0 ! line vty ! end
mpls2网络
root@mpls2:~# ip a 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: enp1s0: <BROADCAST,MULTICAST> mtu 1500 qdisc fq_codel state DOWN group default qlen 1000 link/ether 52:54:00:73:55:cd brd ff:ff:ff:ff:ff:ff inet 192.168.122.164/24 brd 192.168.122.255 scope global enp1s0 valid_lft forever preferred_lft forever 3: enp5s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000 link/ether 52:54:00:ea:64:6e brd ff:ff:ff:ff:ff:ff inet 192.168.2.4/24 scope global enp5s0 valid_lft forever preferred_lft forever 4: enp6s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000 link/ether 52:54:00:d7:a1:de brd ff:ff:ff:ff:ff:ff inet 192.168.1.4/24 scope global enp6s0 valid_lft forever preferred_lft forever 5: lo1: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN group default qlen 1000 link/ether ae:16:70:de:24:3f brd ff:ff:ff:ff:ff:ff inet 4.4.4.4/32 scope global lo1 valid_lft forever preferred_lft forever inet6 fe80::ac16:70ff:fede:243f/64 scope link valid_lft forever preferred_lft forever
mpls3网络
root@mpls3:~# ip a 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: enp1s0: <BROADCAST,MULTICAST> mtu 1500 qdisc fq_codel state DOWN group default qlen 1000 link/ether 52:54:00:5a:42:f2 brd ff:ff:ff:ff:ff:ff 3: enp7s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000 link/ether 52:54:00:98:81:e8 brd ff:ff:ff:ff:ff:ff inet 192.168.2.5/24 scope global enp7s0 valid_lft forever preferred_lft forever 4: lo1: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN group default qlen 1000 link/ether c6:ae:c5:de:5c:f1 brd ff:ff:ff:ff:ff:ff inet 5.5.5.5/32 scope global lo1 valid_lft forever preferred_lft forever
mpls3# sh run Building configuration... Current configuration: ! frr version 7.3.1 frr defaults traditional hostname mpls3 log file /var/log/frr/ospfd.log log syslog informational service integrated-vtysh-config ! debug ospf event debug ospf packet all ! interface enp1s0 shutdown ! router ospf ospf router-id 192.168.122.35 redistribute connected redistribute static network 5.5.5.5/32 area 0 network 192.168.2.0/24 area 0 ! line vty ! end mpls3#
mpls2
mpls2# conf t mpls2(config)# int enp5s0 mpls2(config-if)# ip ospf cost 1 mpls2(config-if)# quit mpls2(config)# int enp6s0 mpls2(config-if)# ip ospf cost 1 mpls2(config-if)# do wr Note: this version of vtysh never writes vtysh.conf Building Configuration... Integrated configuration saved to /etc/frr/frr.conf [OK] mpls2(config-if)# end mpls2# sh run Building configuration... Current configuration: ! frr version 7.3.1 frr defaults traditional hostname mpls2 log file /var/log/frr/ospfd.log log syslog informational service integrated-vtysh-config ! debug ospf event debug ospf packet all ! interface enp1s0 shutdown ! interface enp5s0 ip ospf cost 1 ! interface enp6s0 ip ospf cost 1 ! router ospf ospf router-id 192.168.122.164 redistribute connected redistribute static network 4.4.4.4/32 area 0 network 192.168.1.0/24 area 0 network 192.168.2.0/24 area 0 ! line vty ! end
mpls2# ping 5.5.5.5 PING 5.5.5.5 (5.5.5.5) 56(84) bytes of data. 64 bytes from 5.5.5.5: icmp_seq=1 ttl=64 time=0.146 ms 64 bytes from 5.5.5.5: icmp_seq=2 ttl=64 time=0.113 ms 64 bytes from 5.5.5.5: icmp_seq=3 ttl=64 time=0.109 ms 64 bytes from 5.5.5.5: icmp_seq=4 ttl=64 time=0.112 ms ^C --- 5.5.5.5 ping statistics --- 4 packets transmitted, 4 received, 0% packet loss, time 3075ms rtt min/avg/max/mdev = 0.109/0.120/0.146/0.015 ms mpls2#
root@mpls1:~# tcpdump -i enp7s0 icmp -env tcpdump: listening on enp7s0, link-type EN10MB (Ethernet), capture size 262144 bytes 19:05:23.712528 52:54:00:d7:a1:de > 52:54:00:d9:52:82, ethertype IPv4 (0x0800), length 98: (tos 0x0, ttl 64, id 64989, offset 0, flags [DF], proto ICMP (1), length 84) 192.168.1.4 > 5.5.5.5: ICMP echo request, id 16411, seq 1, length 64 19:05:23.712558 52:54:00:d9:52:82 > 52:54:00:d7:a1:de, ethertype IPv4 (0x0800), length 98: (tos 0x0, ttl 64, id 37469, offset 0, flags [none], proto ICMP (1), length 84) 5.5.5.5 > 192.168.1.4: ICMP echo reply, id 16411, seq 1, length 64 19:05:24.740246 52:54:00:d7:a1:de > 52:54:00:d9:52:82, ethertype IPv4 (0x0800), length 98: (tos 0x0, ttl 64, id 65131, offset 0, flags [DF], proto ICMP (1), length 84) 192.168.1.4 > 5.5.5.5: ICMP echo request, id 16411, seq 2, length 64 19:05:24.740268 52:54:00:d9:52:82 > 52:54:00:d7:a1:de, ethertype IPv4 (0x0800), length 98: (tos 0x0, ttl 64, id 37685, offset 0, flags [none], proto ICMP (1), length 84) 5.5.5.5 > 192.168.1.4: ICMP echo reply, id 16411, seq 2, length 64 19:05:25.764241 52:54:00:d7:a1:de > 52:54:00:d9:52:82, ethertype IPv4 (0x0800), length 98: (tos 0x0, ttl 64, id 65331, offset 0, flags [DF], proto ICMP (1), length 84) 192.168.1.4 > 5.5.5.5: ICMP echo request, id 16411, seq 3, length 64 19:05:25.764263 52:54:00:d9:52:82 > 52:54:00:d7:a1:de, ethertype IPv4 (0x0800), length 98: (tos 0x0, ttl 64, id 37931, offset 0, flags [none], proto ICMP (1), length 84) 5.5.5.5 > 192.168.1.4: ICMP echo reply, id 16411, seq 3, length 64 19:05:26.788248 52:54:00:d7:a1:de > 52:54:00:d9:52:82, ethertype IPv4 (0x0800), length 98: (tos 0x0, ttl 64, id 65381, offset 0, flags [DF], proto ICMP (1), length 84) 192.168.1.4 > 5.5.5.5: ICMP echo request, id 16411, seq 4, length 64 19:05:26.788269 52:54:00:d9:52:82 > 52:54:00:d7:a1:de, ethertype IPv4 (0x0800), length 98: (tos 0x0, ttl 64, id 38182, offset 0, flags [none], proto ICMP (1), length 84) 5.5.5.5 > 192.168.1.4: ICMP echo reply, id 16411, seq 4, length 6
Last login: Thu Aug 6 17:23:41 2020 from 192.168.2.254 root@mpls3:~# tcpdump -i enp7s0 icmp -env ---------------抓不到报文 tcpdump: listening on enp7s0, link-type EN10MB (Ethernet), capture size 262144 bytes
mpls2# conf t mpls2(config)# int enp6s0 mpls2(config-if)# ip ospf cost 5 mpls2(config-if)# do wr Note: this version of vtysh never writes vtysh.conf Building Configuration... Integrated configuration saved to /etc/frr/frr.conf [OK] mpls2(config-if)# end mpls2# sh run Building configuration... Current configuration: ! frr version 7.3.1 frr defaults traditional hostname mpls2 log file /var/log/frr/ospfd.log log syslog informational service integrated-vtysh-config ! debug ospf event debug ospf packet all ! interface enp1s0 shutdown ! interface enp5s0 ip ospf cost 1 ! interface enp6s0 ip ospf cost 5 ! router ospf ospf router-id 192.168.122.164 redistribute connected redistribute static network 4.4.4.4/32 area 0 network 192.168.1.0/24 area 0 network 192.168.2.0/24 area 0 ! line vty ! end mpls2#
mpls2# ping 5.5.5.5 PING 5.5.5.5 (5.5.5.5) 56(84) bytes of data. 64 bytes from 5.5.5.5: icmp_seq=1 ttl=64 time=0.118 ms 64 bytes from 5.5.5.5: icmp_seq=2 ttl=64 time=0.121 ms 64 bytes from 5.5.5.5: icmp_seq=3 ttl=64 time=0.117 ms 64 bytes from 5.5.5.5: icmp_seq=4 ttl=64 time=0.110 ms 64 bytes from 5.5.5.5: icmp_seq=5 ttl=64 time=0.111 ms 64 bytes from 5.5.5.5: icmp_seq=6 ttl=64 time=0.103 ms 64 bytes from 5.5.5.5: icmp_seq=7 ttl=64 time=0.107 ms 64 bytes from 5.5.5.5: icmp_seq=8 ttl=64 time=0.107 ms 64 bytes from 5.5.5.5: icmp_seq=9 ttl=64 time=0.122 ms 64 bytes from 5.5.5.5: icmp_seq=10 ttl=64 time=0.113 ms 64 bytes from 5.5.5.5: icmp_seq=11 ttl=64 time=0.095 ms 64 bytes from 5.5.5.5: icmp_seq=12 ttl=64 time=0.099 ms 64 bytes from 5.5.5.5: icmp_seq=13 ttl=64 time=0.095 ms 64 bytes from 5.5.5.5: icmp_seq=14 ttl=64 time=0.098 ms 64 bytes from 5.5.5.5: icmp_seq=15 ttl=64 time=0.097 ms 64 bytes from 5.5.5.5: icmp_seq=16 ttl=64 time=0.100 ms 64 bytes from 5.5.5.5: icmp_seq=17 ttl=64 time=0.096 ms 64 bytes from 5.5.5.5: icmp_seq=18 ttl=64 time=0.097 ms 64 bytes from 5.5.5.5: icmp_seq=19 ttl=64 time=0.094 ms 64 bytes from 5.5.5.5: icmp_seq=20 ttl=64 time=0.086 ms 64 bytes from 5.5.5.5: icmp_seq=21 ttl=64 time=0.099 ms 64 bytes from 5.5.5.5: icmp_seq=22 ttl=64 time=0.095 ms 64 bytes from 5.5.5.5: icmp_seq=23 ttl=64 time=0.090 ms 64 bytes from 5.5.5.5: icmp_seq=24 ttl=64 time=0.089 ms 64 bytes from 5.5.5.5: icmp_seq=25 ttl=64 time=0.103 ms 64 bytes from 5.5.5.5: icmp_seq=26 ttl=64 time=0.115 ms 64 bytes from 5.5.5.5: icmp_seq=27 ttl=64 time=0.120 ms 64 bytes from 5.5.5.5: icmp_seq=28 ttl=64 time=0.125 ms 64 bytes from 5.5.5.5: icmp_seq=29 ttl=64 time=0.124 ms 64 bytes from 5.5.5.5: icmp_seq=30 ttl=64 time=0.106 ms
root@mpls3:~# tcpdump -i enp7s0 icmp -env tcpdump: listening on enp7s0, link-type EN10MB (Ethernet), capture size 262144 bytes 19:08:21.433039 52:54:00:ea:64:6e > 52:54:00:98:81:e8, ethertype IPv4 (0x0800), length 98: (tos 0x0, ttl 64, id 35632, offset 0, flags [DF], proto ICMP (1), length 84) 192.168.2.4 > 5.5.5.5: ICMP echo request, id 16415, seq 27, length 64 19:08:21.433065 52:54:00:98:81:e8 > 52:54:00:ea:64:6e, ethertype IPv4 (0x0800), length 98: (tos 0x0, ttl 64, id 61723, offset 0, flags [none], proto ICMP (1), length 84) 5.5.5.5 > 192.168.2.4: ICMP echo reply, id 16415, seq 27, length 64 19:08:22.457043 52:54:00:ea:64:6e > 52:54:00:98:81:e8, ethertype IPv4 (0x0800), length 98: (tos 0x0, ttl 64, id 35717, offset 0, flags [DF], proto ICMP (1), length 84) 192.168.2.4 > 5.5.5.5: ICMP echo request, id 16415, seq 28, length 64 19:08:22.457062 52:54:00:98:81:e8 > 52:54:00:ea:64:6e, ethertype IPv4 (0x0800), length 98: (tos 0x0, ttl 64, id 61786, offset 0, flags [none], proto ICMP (1), length 84) 5.5.5.5 > 192.168.2.4: ICMP echo reply, id 16415, seq 28, length 64 19:08:23.481039 52:54:00:ea:64:6e > 52:54:00:98:81:e8, ethertype IPv4 (0x0800), length 98: (tos 0x0, ttl 64, id 35788, offset 0, flags [DF], proto ICMP (1), length 84) 192.168.2.4 > 5.5.5.5: ICMP echo request, id 16415, seq 29, length 64 19:08:23.481057 52:54:00:98:81:e8 > 52:54:00:ea:64:6e, ethertype IPv4 (0x0800), length 98: (tos 0x0, ttl 64, id 61926, offset 0, flags [none], proto ICMP (1), length 84) 5.5.5.5 > 192.168.2.4: ICMP echo reply, id 16415, seq 29, length 64 ^C 6 packets captured 6 packets received by filter 0 packets dropped by kernel root@mpls3:~#
root@mpls1:~# tcpdump -i enp7s0 icmp -env -----------抓不到 tcpdump: listening on enp7s0, link-type EN10MB (Ethernet), capture size 262144 bytes
mpls2# sh ip ospf route ============ OSPF network routing table ============ N 3.3.3.3/32 [15] area: 0.0.0.0 via 192.168.1.3, enp6s0 N 4.4.4.4/32 [10] area: 0.0.0.0 directly attached to lo1 N 5.5.5.5/32 [15] area: 0.0.0.0 via 192.168.1.3, enp6s0 N 192.168.1.0/24 [5] area: 0.0.0.0 directly attached to enp6s0 N 192.168.2.0/24 [6] area: 0.0.0.0 directly attached to enp5s0 ============ OSPF router routing table ============= R 192.168.122.35 [6] area: 0.0.0.0, ASBR via 192.168.2.5, enp5s0 R 192.168.122.198 [5] area: 0.0.0.0, ASBR via 192.168.1.3, enp6s0 ============ OSPF external routing table =========== mpls2# sh ip a % Ambiguous command: sh ip a mpls2# sh ip route Codes: K - kernel route, C - connected, S - static, R - RIP, O - OSPF, I - IS-IS, B - BGP, E - EIGRP, N - NHRP, T - Table, v - VNC, V - VNC-Direct, A - Babel, D - SHARP, F - PBR, f - OpenFabric, > - selected route, * - FIB route, q - queued route, r - rejected route O>* 3.3.3.3/32 [110/15] via 192.168.1.3, enp6s0, 00:11:29 O 4.4.4.4/32 [110/10] via 0.0.0.0, lo1 onlink, 2d01h11m C>* 4.4.4.4/32 is directly connected, lo1, 2d01h11m O>* 5.5.5.5/32 [110/15] via 192.168.1.3, enp6s0, 00:05:38 O 192.168.1.0/24 [110/5] is directly connected, enp6s0, 00:11:29 C>* 192.168.1.0/24 is directly connected, enp6s0, 2d01h11m O 192.168.2.0/24 [110/6] is directly connected, enp5s0, 00:05:38 C>* 192.168.2.0/24 is directly connected, enp5s0, 2d01h11m mpls2#
mpls1# sh ip route Codes: K - kernel route, C - connected, S - static, R - RIP, O - OSPF, I - IS-IS, B - BGP, E - EIGRP, N - NHRP, T - Table, v - VNC, V - VNC-Direct, A - Babel, D - SHARP, F - PBR, f - OpenFabric, > - selected route, * - FIB route, q - queued route, r - rejected route O 3.3.3.3/32 [110/10] via 0.0.0.0, lo1 onlink, 2d00h21m C>* 3.3.3.3/32 is directly connected, lo1, 2d00h21m O>* 4.4.4.4/32 [110/11] via 192.168.1.4, enp7s0, 2d00h12m O 5.5.5.5/32 [110/10] via 0.0.0.0, lo2 onlink, 01:49:06 C>* 5.5.5.5/32 is directly connected, lo2, 02:02:46 O 192.168.1.0/24 [110/1] is directly connected, enp7s0, 2d00h12m C>* 192.168.1.0/24 is directly connected, enp7s0, 2d00h21m O>* 192.168.2.0/24 [110/7] via 192.168.1.4, enp7s0, 00:06:22 mpls1#
mpls3# sh ip ospf route ============ OSPF network routing table ============ N 3.3.3.3/32 [16] area: 0.0.0.0 via 192.168.2.4, enp7s0 N 4.4.4.4/32 [11] area: 0.0.0.0 via 192.168.2.4, enp7s0 N 5.5.5.5/32 [10] area: 0.0.0.0 directly attached to lo1 N 192.168.1.0/24 [6] area: 0.0.0.0 via 192.168.2.4, enp7s0 N 192.168.2.0/24 [1] area: 0.0.0.0 directly attached to enp7s0 ============ OSPF router routing table ============= R 192.168.122.164 [1] area: 0.0.0.0, ASBR via 192.168.2.4, enp7s0 R 192.168.122.198 [6] area: 0.0.0.0, ASBR via 192.168.2.4, enp7s0 ============ OSPF external routing table =========== mpls3# sh ip route Codes: K - kernel route, C - connected, S - static, R - RIP, O - OSPF, I - IS-IS, B - BGP, E - EIGRP, N - NHRP, T - Table, v - VNC, V - VNC-Direct, A - Babel, D - SHARP, F - PBR, f - OpenFabric, > - selected route, * - FIB route, q - queued route, r - rejected route K * 0.0.0.0/0 [0/100] via 192.168.122.1, enp1s0 inactive, src 192.168.122.35, 01:15:11 O>* 3.3.3.3/32 [110/16] via 192.168.2.4, enp7s0, 00:13:12 O>* 4.4.4.4/32 [110/11] via 192.168.2.4, enp7s0, 1d23h38m O 5.5.5.5/32 [110/10] via 0.0.0.0, lo1 onlink, 2d00h21m C>* 5.5.5.5/32 is directly connected, lo1, 2d00h21m O>* 192.168.1.0/24 [110/6] via 192.168.2.4, enp7s0, 00:13:12 O 192.168.2.0/24 [110/1] is directly connected, enp7s0, 2d00h21m C>* 192.168.2.0/24 is directly connected, enp7s0, 2d00h21m mpls3#
把mpls2，两个端口的 cost改成一样
mpls2# conf t mpls2(config)# int enp6s0 mpls2(config-if)# ip ospft cost 1 % Unknown command: ip ospft cost 1 mpls2(config-if)# ip ospf cost 1 mpls2(config-if)# quit mpls2(config)# int enp5s0 mpls2(config-if)# ip ospft cost 1 % Unknown command: ip ospft cost 1 mpls2(config-if)# ip ospf cost 1 mpls2(config-if)# end mpls2# wr Note: this version of vtysh never writes vtysh.conf Building Configuration... Integrated configuration saved to /etc/frr/frr.conf [OK] mpls2# sh ip route Codes: K - kernel route, C - connected, S - static, R - RIP, O - OSPF, I - IS-IS, B - BGP, E - EIGRP, N - NHRP, T - Table, v - VNC, V - VNC-Direct, A - Babel, D - SHARP, F - PBR, f - OpenFabric, > - selected route, * - FIB route, q - queued route, r - rejected route O>* 3.3.3.3/32 [110/11] via 192.168.1.3, enp6s0, 00:00:56 O 4.4.4.4/32 [110/10] via 0.0.0.0, lo1 onlink, 2d01h15m C>* 4.4.4.4/32 is directly connected, lo1, 2d01h15m O>* 5.5.5.5/32 [110/11] via 192.168.1.3, enp6s0, 00:00:36 * via 192.168.2.5, enp5s0, 00:00:36 O 192.168.1.0/24 [110/1] is directly connected, enp6s0, 00:00:56 C>* 192.168.1.0/24 is directly connected, enp6s0, 2d01h15m O 192.168.2.0/24 [110/1] is directly connected, enp5s0, 00:00:36 C>* 192.168.2.0/24 is directly connected, enp5s0, 2d01h15m mpls2#
root@mpls2:~# ping 5.5.5.5 -I 4.4.4.4 PING 5.5.5.5 (5.5.5.5) from 4.4.4.4 : 56(84) bytes of data. 64 bytes from 5.5.5.5: icmp_seq=1 ttl=64 time=0.153 ms 64 bytes from 5.5.5.5: icmp_seq=2 ttl=64 time=0.124 ms 64 bytes from 5.5.5.5: icmp_seq=3 ttl=64 time=0.120 ms 64 bytes from 5.5.5.5: icmp_seq=4 ttl=64 time=0.120 ms 64 bytes from 5.5.5.5: icmp_seq=5 ttl=64 time=0.127 ms ^C --- 5.5.5.5 ping statistics --- 5 packets transmitted, 5 received, 0% packet loss, time 4102ms rtt min/avg/max/mdev = 0.120/0.128/0.153/0.018 ms root@mpls2:~#
root@mpls1:~# tcpdump -i enp7s0 icmp -env tcpdump: listening on enp7s0, link-type EN10MB (Ethernet), capture size 262144 bytes 19:25:28.850588 52:54:00:d7:a1:de > 52:54:00:d9:52:82, ethertype IPv4 (0x0800), length 98: (tos 0x0, ttl 64, id 7350, offset 0, flags [DF], proto ICMP (1), length 84) 4.4.4.4 > 5.5.5.5: ICMP echo request, id 16437, seq 1, length 64 19:25:28.850619 52:54:00:d9:52:82 > 52:54:00:d7:a1:de, ethertype IPv4 (0x0800), length 98: (tos 0x0, ttl 64, id 31686, offset 0, flags [none], proto ICMP (1), length 84) 5.5.5.5 > 4.4.4.4: ICMP echo reply, id 16437, seq 1, length 64 19:25:29.862278 52:54:00:d7:a1:de > 52:54:00:d9:52:82, ethertype IPv4 (0x0800), length 98: (tos 0x0, ttl 64, id 7532, offset 0, flags [DF], proto ICMP (1), length 84) 4.4.4.4 > 5.5.5.5: ICMP echo request, id 16437, seq 2, length 64 19:25:29.862297 52:54:00:d9:52:82 > 52:54:00:d7:a1:de, ethertype IPv4 (0x0800), length 98: (tos 0x0, ttl 64, id 31818, offset 0, flags [none], proto ICMP (1), length 84) 5.5.5.5 > 4.4.4.4: ICMP echo reply, id 16437, seq 2, length 64 19:25:30.886288 52:54:00:d7:a1:de > 52:54:00:d9:52:82, ethertype IPv4 (0x0800), length 98: (tos 0x0, ttl 64, id 7613, offset 0, flags [DF], proto ICMP (1), length 84) 4.4.4.4 > 5.5.5.5: ICMP echo request, id 16437, seq 3, length 64 19:25:30.886306 52:54:00:d9:52:82 > 52:54:00:d7:a1:de, ethertype IPv4 (0x0800), length 98: (tos 0x0, ttl 64, id 31889, offset 0, flags [none], proto ICMP (1), length 84) 5.5.5.5 > 4.4.4.4: ICMP echo reply, id 16437, seq 3, length 64