网络带宽
- 开测试防火墙性能NetIO
- 光纤专线的带宽是否缩水
- 实际承受的流量
- iperf3
- 模拟出来的流量并非真实带宽
测试网络带宽
iperf3
支持TCP/SCTP/UDP协议
跨平台
多连接(模拟多用户)
支持IPv6
安装
# 服务端和客户端都是这一个软件包
apt install iperf3
# 默认侦听端口:5201
参数
# iperf3
-p, --port # server port to listen on/connect to
-f, --format #[kmgKMG] format to report: Kbits, Mbits, KBytes, MBytes
-i, --interval # seconds between periodic bandwidth reports
-F, --file name # xmit/recv the specified file, 指定文件打到对方
-A, --affinity n/n,m set CPU affinity
-B, --bind <host> bind to a specific interface
-V, --verbose more detailed output
-J, --json output in JSON format
--logfile f send output to a log file
-d, --debug emit debugging output
-v, --version show version information and quit
-h, --help show this message and quit
Server specific:
-s, --server run in server mode
-D, --daemon run the server as a daemon # 后台运行
-I, --pidfile file write PID file
-1, --one-off handle one client connection then exit # 只接收第一个客户端的测试
Client specific:
-c, --client <host> run in client mode, connecting to <host>
-u, --udp #use UDP rather than TCP
-b, --bandwidth #[KMG][/#] target bandwidth in bits/sec (0 for unlimited) # 限制流量带宽
(default 1 Mbit/sec for UDP, unlimited for TCP)
(optional slash and packet count for burst mode)
-t, --time # time in seconds to transmit for (default 10 secs) # 测试时长(默认10s)
-n, --bytes #[KMG] number of bytes to transmit (instead of -t)
-k, --blockcount #[KMG] number of blocks (packets) to transmit (instead of -t or -n)
-l, --len #[KMG] length of buffer to read or write
(default 128 KB for TCP, 8 KB for UDP)
--cport <port> bind to a specific client port (TCP and UDP, default: ephemeral port)
-P, --parallel # number of parallel client streams to run # 并发数量
-R, --reverse run in reverse mode (server sends, client receives)
-w, --window #[KMG] set window size / socket buffer size
-C, --congestion <algo> set TCP congestion control algorithm (Linux and FreeBSD only)
-M, --set-mss # set TCP/SCTP maximum segment size (MTU - 40 bytes)
-N, --no-delay set TCP/SCTP no delay, disabling Nagle's Algorithm
-4, --version4 only use IPv4
-6, --version6 only use IPv6
-S, --tos N set the IP 'type of service'
-L, --flowlabel N set the IPv6 flow label (only supported on Linux)
-Z, --zerocopy use a 'zero copy' method of sending data
-O, --omit N omit the first n seconds
-T, --title str prefix every output line with this string
--get-server-output get results from server
--udp-counters-64bit use 64-bit counters in UDP test packets
--no-fq-socket-pacing disable fair-queuing based socket pacing
使用
# 作为服务端
iperf3 -s
# 作为客户端,连接服务端
iperf3 -c 192.168.0.111
查看当前带宽占用
1.nload
须在问题发生当下执行命令
# 安装
apt install nload
# 使用
sudo nload
nload -uk -U m enp0s3 # 查看指定网卡流量(如果不指定会自动查找网卡)
nload -m # 同时查看多网卡流量
2.iftop
优点:会显示流量通信之间的主机双方
# 安装
apt install iftop
# 运行
sudo iftop
sudo iftop -n -N # 不解析域名、端口(以ip地址形式显示通信双方)
# 其他参数
-p # 混杂模式(凡是流经你网卡的流量都会被探测)
-i eth0 # 指定网卡
3.iptraf
# 安装两个软件包
sudo apt install iptraf iptraf-ng
sudo iptraf-ng # 字符菜单方式展示
# 选择,高亮显示,详细信息,配置...
4. nethogs
可显示每个进程所使用的带宽
# 产生大流量不一定是病毒
# 安装
sudo apt install nethogs
其他工具
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