Network Burst
Determine Burstsize
Burst
In general in various metering and policing implementations, burst
size means the granularity of the meter. For example, OpenFlow spec
says:
It defines the granularity of the meter band, for all packet or byte
bursts whose length is greater than burst value, the meter rate will
always be strictly enforced.
ht...
Scapy
Official Documentation
Scapy is a Python program that enables the user to send, sniff and dissect and forge network packets.
This capability allows construction of tools that can probe, scan or attack networks.
Simple usage
# execute 'scapy' to enter scapy shell.
# specify IP Header value and create packets, this will create 4 packets as th...
kernel options
https://beaker-project.org/docs/
modprobe.blacklist
You can use any of the below method to enable qedf debug logs.
echo 0x1 > /sys/module/qedf/parameters/debug
insmod drivers/scsi/qedf/qedf.ko debug=1
I installed a distro first with kernel option modprobe.blacklist=qedf.
After the system boot up, i installed your kernel with "rpm -ivh --fo...
IPv6 Address Auto Configuration
Reserved
IPv4 dhcp
1.dhcp discovery: 客户端以广播方式发出dhcp discovery消息,寻找本地子网内的dhcp服务器,
源地址是客户端最近一次获取的dhcp地址,或者0.0.0.0
2.dhcp offer: 子网内的一台或多台dhcp服务器回应dhcp offer消息,消息中包括一个建议的ip和掩码,
还包括dhcp服务器的id,即服务器的ip地址
3.dhcp request: 客户端以广播的方式发出dhcp request,确认特定dhcp服务器的dhcp offer。
消息中会包括dhcp服务器的id。使用广播的方式,是因为要向其他d...
IPv6 Header
Reserved
IPv6 Header
ipv6包头固定40字节。
|4位IP版本--8位流量类别--20位流标签--16位净载长度--8位下一个头部--8位跳限制|
|----------------------源IP------------------------------------------------|
|----------------------源IP------------------------------------------------|
|--------------------目的IP------------------------------------------------|
|--------------------目的IP------...
IPv6 Address
Reserved
IPv6 Address表示方法
使用8块4位16进制数表示IPv6地址,
共8块,每一块包括4位16进制数字。
如:
2001:0001:0001:0001:0001:0001:0001:0001
共128位
可以省略前导0
如:
2001:1:1:1:1:1:1:1
也可以省略全0的块
如:
2001:0001:0000:0000:0000:0000:0000:0002 –> 2001:0001::0002
但是只能省略一组全0的块(最长的一组,或者第一个组)
ipv6-address/prefix-length(地址/前缀长度)
2001:0001::0001/64 前缀长度64,后面64位是接口ID(对应IPv4中的主机地址)
IPV...
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