7.8 KiB
7.8 KiB
router table
| device | eth | ip |
|---|---|---|
| PC1 | eth1 | 10.5.0.2/24 |
| PC2 | eth1 | 10.5.1.2/24 |
| router1 | eth1 | 10.5.0.1/24 |
| router2 | eth1 | 10.5.1.1/24 |
router -> router
sender # sender eth # receiver # receiver eth # losses #
1 2 2 2 20
1 3 3 2 20
1 4 4 1 0
2 2 1 2 20
2 3 3 3 0
2 4 4 2 0
3 2 1 3 0
3 3 2 3 0
3 4 4 3 0
4 1 1 4 0
4 2 2 4 0
4 3 3 4 0
router -> pc
sender # sender eth # receiver # receiver eth # losses # │
1 1 1 1 0 │
2 1 1 1 0 │
2 1 2 1 0 │
2 1 3 1 0 │
3 1 3 1 0
pc->pc
sender # sender eth # receiver # receiver eth # losses #
2 1 1 1 0
2 1 3 1 0
pc->router
sender # sender eth # receiver # receiver eth # losses #
2 1 2 1 0
3 1 3 1 0
Tcpdump output
with -e
listening on eth1, link-type EN10MB (Ethernet), snapshot length 262144 bytes
10:51:44.767031 00:16:3e:00:00:08 (oui Unknown) > 00:16:3e:00:00:02 (oui Unknown), ethertype IPv4 (0x0800
), length 98: 10.5.1.1 > 10.5.1.2: ICMP echo request, id 4813, seq 18, length 64
10:51:44.767055 00:16:3e:00:00:02 (oui Unknown) > 00:16:3e:00:00:08 (oui Unknown), ethertype IPv4 (0x0800
), length 98: 10.5.1.2 > 10.5.1.1: ICMP echo reply, id 4813, seq 18, length 64
10:51:45.767125 00:16:3e:00:00:08 (oui Unknown) > 00:16:3e:00:00:02 (oui Unknown), ethertype IPv4 (0x0800
), length 98: 10.5.1.1 > 10.5.1.2: ICMP echo request, id 4813, seq 19, length 64
10:51:45.767160 00:16:3e:00:00:02 (oui Unknown) > 00:16:3e:00:00:08 (oui Unknown), ethertype IPv4 (0x0800
), length 98: 10.5.1.2 > 10.5.1.1: ICMP echo reply, id 4813, seq 19, length 64 10:51:46.767229 00:16:3e:00:00:08 (oui Unknown) > 00:16:3e:00:00:02 (oui Unknown), ethertype IPv4 (0x0800
), length 98: 10.5.1.1 > 10.5.1.2: ICMP echo request, id 4813, seq 20, length 64
10:51:46.767253 00:16:3e:00:00:02 (oui Unknown) > 00:16:3e:00:00:08 (oui Unknown), ethertype IPv4 (0x0800
), length 98: 10.5.1.2 > 10.5.1.1: ICMP echo reply, id 4813, seq 20, length 64
10:51:47.767360 00:16:3e:00:00:08 (oui Unknown) > 00:16:3e:00:00:02 (oui Unknown), ethertype IPv4 (0x0800
), length 98: 10.5.1.1 > 10.5.1.2: ICMP echo request, id 4813, seq 21, length 64
10:51:47.767384 00:16:3e:00:00:02 (oui Unknown) > 00:16:3e:00:00:08 (oui Unknown), ethertype IPv4 (0x0800
), length 98: 10.5.1.2 > 10.5.1.1: ICMP echo reply, id 4813, seq 21, length 64
10:51:48.767451 00:16:3e:00:00:08 (oui Unknown) > 00:16:3e:00:00:02 (oui Unknown), ethertype IPv4 (0x0800
), length 98: 10.5.1.1 > 10.5.1.2: ICMP echo request, id 4813, seq 22, length 64
10:51:48.767475 00:16:3e:00:00:02 (oui Unknown) > 00:16:3e:00:00:08 (oui Unknown), ethertype IPv4 (0x0800
), length 98: 10.5.1.2 > 10.5.1.1: ICMP echo reply, id 4813, seq 22, length 64
10:51:49.767591 00:16:3e:00:00:08 (oui Unknown) > 00:16:3e:00:00:02 (oui Unknown), ethertype IPv4 (0x0800
), length 98: 10.5.1.1 > 10.5.1.2: ICMP echo request, id 4813, seq 23, length 64
without -e
listening on eth1, link-type EN10MB (Ethernet), snapshot length 262144 bytes
10:52:40.775534 IP 10.5.1.1 > 10.5.1.2: ICMP echo request, id 4813, seq 74, length 64
10:52:40.775559 IP 10.5.1.2 > 10.5.1.1: ICMP echo reply, id 4813, seq 74, length 64
10:52:41.775635 IP 10.5.1.1 > 10.5.1.2: ICMP echo request, id 4813, seq 75, length 64
10:52:41.775660 IP 10.5.1.2 > 10.5.1.1: ICMP echo reply, id 4813, seq 75, length 64
10:52:41.850588 ARP, Request who-has 10.5.1.2 tell 10.5.1.1, length 28
10:52:41.850603 ARP, Reply 10.5.1.2 is-at 00:16:3e:00:00:02 (oui Unknown), length 28
10:52:42.775751 IP 10.5.1.1 > 10.5.1.2: ICMP echo request, id 4813, seq 76, length 64
10:52:42.775774 IP 10.5.1.2 > 10.5.1.1: ICMP echo reply, id 4813, seq 76, length 64
10:52:43.775955 IP 10.5.1.1 > 10.5.1.2: ICMP echo request, id 4813, seq 77, length 64
10:52:43.775984 IP 10.5.1.2 > 10.5.1.1: ICMP echo reply, id 4813, seq 77, length 64
10:52:44.776094 IP 10.5.1.1 > 10.5.1.2: ICMP echo request, id 4813, seq 78, length 64
10:52:44.776119 IP 10.5.1.2 > 10.5.1.1: ICMP echo reply, id 4813, seq 78, length 64
10:52:45.776221 IP 10.5.1.1 > 10.5.1.2: ICMP echo request, id 4813, seq 79, length 64
10:52:45.776246 IP 10.5.1.2 > 10.5.1.1: ICMP echo reply, id 4813, seq 79, length
主要工具：ip
ip 是 IPRoute2 工具集中最常用的命令，能够管理和配置 IP 地址、路由、链路等多种网络参数。与旧版的 ifconfig 和 route 命令相比，ip 更加灵活和强大。
ip 命令的常见用法
-
查看网络接口：
ip link show显示所有网络接口及其状态，类似于
ifconfig。 -
启用或禁用网络接口：
sudo ip link set dev eth0 up # 启用接口 sudo ip link set dev eth0 down # 禁用接口 -
添加/删除 IP 地址：
sudo ip address add 192.168.1.10/24 dev eth0 # 为 eth0 接口添加 IP 地址 sudo ip address del 192.168.1.10/24 dev eth0 # 从 eth0 接口删除 IP 地址 -
显示路由表：
ip route show显示当前的路由表，类似于
route命令。 -
添加/删除路由：
sudo ip route add 192.168.1.0/24 via 192.168.1.1 # 添加路由条目 sudo ip route del 192.168.1.0/24 # 删除路由条目 -
查看 ARP 表：
ip neighbor show显示 ARP 表，类似于
arp -a。