• ospf loopback


    192.168.122.164节点
    2: enp1s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP 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: lo1: <BROADCAST,NOARP,UP,LOWER_UP> mtu 1500 qdisc noqueue state UNKNOWN group default qlen 1000
        link/ether 02:03:d8:fd:a2:07 brd ff:ff:ff:ff:ff:ff
        inet 4.4.4.4/32 scope global lo1
           valid_lft forever preferred_lft forever
        inet6 fe80::3:d8ff:fefd:a207/64 scope link 
           valid_lft forever preferred_lft forever
    ubuntu# show run
    Building configuration...
    
    Current configuration:
    !
    frr version 7.3.1
    frr defaults traditional
    hostname ubuntu
    log file /var/log/frr/ospfd.log
    log syslog informational
    service integrated-vtysh-config
    !
    debug ospf event
    debug ospf packet all
    !
    router ospf
     ospf router-id 192.168.122.164
     network 4.4.4.4/32 area 0
     network 192.168.122.0/24 area 0
    !
    mpls ldp
     router-id 192.168.122.164
     !
     address-family ipv4
      discovery transport-address 192.168.122.164
      !
      interface enp1s0
      !
     exit-address-family
     !
    !
    line vty
    !
    end
    ubuntu# 

    192.168.122.198节点

    root@ubuntu:/home/devuser# 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 192.168.122.198/24 brd 192.168.122.255 scope global dynamic enp1s0
           valid_lft 3356sec preferred_lft 3356sec
        inet6 fe80::5054:ff:fee5:3019/64 scope link 
           valid_lft forever preferred_lft forever
    root@ubuntu:/home/devuser# vtysh
    
    Hello, this is FRRouting (version 7.3.1).
    Copyright 1996-2005 Kunihiro Ishiguro, et al.
    
    ubuntu# sh run
    Building configuration...
    
    Current configuration:
    !
    frr version 7.3.1
    frr defaults traditional
    hostname ubuntu
    log syslog informational
    service integrated-vtysh-config
    !
    router ospf
     ospf router-id 192.168.122.198
     network 192.168.122.0/24 area 0
    !
    mpls ldp
     router-id 192.168.122.198
     !
     address-family ipv4
      discovery transport-address 192.168.122.198
      !
      interface enp1s0
      !
     exit-address-family
     !
    !
    line vty
    !
    end
    ubuntu# 
    192.168.122.164节点
    root@ubuntu:/home/devuser# ping 192.168.122.198 -I lo1
    PING 192.168.122.198 (192.168.122.198) from 4.4.4.4 lo1: 56(84) bytes of data.
    ^C
    --- 192.168.122.198 ping statistics ---
    4 packets transmitted, 0 received, 100% packet loss, time 3052ms
    
    root@ubuntu:/home/devuser# 
    root@ubuntu:/home/devuser# tcpdump -i  enp1s0 icmp -env
    tcpdump: listening on enp1s0, link-type EN10MB (Ethernet), capture size 262144 bytes
    12:15:42.688992 52:54:00:e5:30:19 > 52:54:00:73:55:cd, ethertype IPv4 (0x0800), length 98: (tos 0x0, ttl 64, id 6370, offset 0, flags [DF], proto ICMP (1), length 84)
        192.168.122.198 > 4.4.4.4: ICMP echo request, id 1895, seq 6, length 64
    12:15:42.689017 52:54:00:73:55:cd > 52:54:00:e5:30:19, ethertype IPv4 (0x0800), length 98: (tos 0x0, ttl 64, id 26095, offset 0, flags [none], proto ICMP (1), length 84)
        4.4.4.4 > 192.168.122.198: ICMP echo reply, id 1895, seq 6, length 64
    12:15:43.712940 52:54:00:e5:30:19 > 52:54:00:73:55:cd, ethertype IPv4 (0x0800), length 98: (tos 0x0, ttl 64, id 6451, offset 0, flags [DF], proto ICMP (1), length 84)
        192.168.122.198 > 4.4.4.4: ICMP echo request, id 1895, seq 7, length 64
    12:15:43.712966 52:54:00:73:55:cd > 52:54:00:e5:30:19, ethertype IPv4 (0x0800), length 98: (tos 0x0, ttl 64, id 26306, offset 0, flags [none], proto ICMP (1), length 84)
        4.4.4.4 > 192.168.122.198: ICMP echo reply, id 1895, seq 7, length 64
    12:15:44.736938 52:54:00:e5:30:19 > 52:54:00:73:55:cd, ethertype IPv4 (0x0800), length 98: (tos 0x0, ttl 64, id 6528, offset 0, flags [DF], proto ICMP (1), length 84)
        192.168.122.198 > 4.4.4.4: ICMP echo request, id 1895, seq 8, length 64
    12:15:44.736961 52:54:00:73:55:cd > 52:54:00:e5:30:19, ethertype IPv4 (0x0800), length 98: (tos 0x0, ttl 64, id 26478, offset 0, flags [none], proto ICMP (1), length 84)
        4.4.4.4 > 192.168.122.198: ICMP echo reply, id 1895, seq 8, length 64
    12:15:45.760874 52:54:00:e5:30:19 > 52:54:00:73:55:cd, ethertype IPv4 (0x0800), length 98: (tos 0x0, ttl 64, id 6537, offset 0, flags [DF], proto ICMP (1), length 84)
        192.168.122.198 > 4.4.4.4: ICMP echo request, id 1895, seq 9, length 64
    12:15:45.760892 52:54:00:73:55:cd > 52:54:00:e5:30:19, ethertype IPv4 (0x0800), length 98: (tos 0x0, ttl 64, id 26560, offset 0, flags [none], proto ICMP (1), length 84)
        4.4.4.4 > 192.168.122.198: ICMP echo reply, id 1895, seq 9, length 64
    12:15:46.784859 52:54:00:e5:30:19 > 52:54:00:73:55:cd, ethertype IPv4 (0x0800), length 98: (tos 0x0, ttl 64, id 6747, offset 0, flags [DF], proto ICMP (1), length 84)
        192.168.122.198 > 4.4.4.4: ICMP echo request, id 1895, seq 10, length 64
    12:15:46.784886 52:54:00:73:55:cd > 52:54:00:e5:30:19, ethertype IPv4 (0x0800), length 98: (tos 0x0, ttl 64, id 26651, offset 0, flags [none], proto ICMP (1), length 84)
        4.4.4.4 > 192.168.122.198: ICMP echo reply, id 1895, seq 10, length 64
    ^C
    10 packets captured
    10 packets received by filter
    0 packets dropped by kernel
    192.168.122.198节点
    root@ubuntu:/home/devuser# ping  4.4.4.4
    PING 4.4.4.4 (4.4.4.4) 56(84) bytes of data.
    64 bytes from 4.4.4.4: icmp_seq=1 ttl=64 time=0.111 ms
    64 bytes from 4.4.4.4: icmp_seq=2 ttl=64 time=0.102 ms
    64 bytes from 4.4.4.4: icmp_seq=3 ttl=64 time=0.086 ms
    64 bytes from 4.4.4.4: icmp_seq=4 ttl=64 time=0.100 ms
    64 bytes from 4.4.4.4: icmp_seq=5 ttl=64 time=0.094 ms
    64 bytes from 4.4.4.4: icmp_seq=6 ttl=64 time=0.110 ms
    64 bytes from 4.4.4.4: icmp_seq=7 ttl=64 time=0.107 ms
    64 bytes from 4.4.4.4: icmp_seq=8 ttl=64 time=0.098 ms
    64 bytes from 4.4.4.4: icmp_seq=9 ttl=64 time=0.088 ms
    64 bytes from 4.4.4.4: icmp_seq=10 ttl=64 time=0.108 ms
    64 bytes from 4.4.4.4: icmp_seq=11 ttl=64 time=0.089 ms
    64 bytes from 4.4.4.4: icmp_seq=12 ttl=64 time=0.092 ms
    ^C
    --- 4.4.4.4 ping statistics ---
    12 packets transmitted, 12 received, 0% packet loss, time 11255ms
    rtt min/avg/max/mdev = 0.086/0.098/0.111/0.014 ms
    root@ubuntu:/home/devuser# 
     
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  • 原文地址:https://www.cnblogs.com/dream397/p/13396387.html
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