ipv4 octets

. open_file_cache_min_uses 1; The inactive parameter in the open_file_cache command specifies the minimum number of times files are used. If this number is exceeded, the file descriptor is always opened in the cache. For example, if a file is not used once in the inactive time, it will be removed. Ii. Kernel Parameter Optimization: Net. ipv4.tcp _ max_tw_buckets = 6000 The number of timewait instances. The default value is 180000. Net.

open_file_cache command. if this number is exceeded, the file descriptor is always opened in the cache. for example, if a file is not used once in the inactive time, it will be removed.Kernel parameter optimizationNet. ipv4.tcp _ max_tw_buckets = 6000timewait. the default value is 180000.Net. ipv4.ip _ local_port_range = 1024 65000 port range that allows the system to open.Net.

octets. the most significant bits are placed in the first octets with the least significant bits ending up in the last octet. all octets must set the continue bit to 1 hour t the last octet, which must set the continue bit to 0.For example, the number 0x87a5 (1000 0111 1010 0101) is encoded in three octets:1 0000010 1

field based on the configured MPs (max pus) size. FCS (2 byte) is used to check this frame. The calculation is complicated and not detailed. 5. Signaling packet formats I mentioned several types of PDUS and a C-frame. C-frame is dedicated to signaling channel (0x0001 or 0x0005), and signaling commands is transmitted on it. Note that a C-frame in the 0x0001 channel can transmit multiple commands at the same time, and only one command can be transmitted at 0x0005. The payload length cannot exceed

. Client_header_buffer_size 4 k; the buffer size of the client request header, which can be set according to your system page size. Generally, the size of the header of a request will not exceed 1 k, however, generally, the system page size must be greater than 1 k, so the page size is set here. You can use the getconf PAGESIZE command to obtain the page size. Open_file_cache max = 102400 inactive = 20 s; this will specify the cache for opening the file, which is not enabled by default. max spec

time.Client_header_buffer_size 4 k; the buffer size of the client request header, which can be set according to your system page size. Generally, the size of the header of a request will not exceed 1 k, however, generally, the system page size must be greater than 1 k, so the page size is set here. You can use the getconf PAGESIZE command to obtain the page size.Open_file_cache max = 102400 inactive = 20 s; this will specify the cache for opening the file, which is not enabled by default. max s

to how long it takes to check the cache's valid information. Open_file_cache_min_uses 1; The inactive parameter in the open_file_cache command specifies the minimum number of times files are used. If this number is exceeded, the file descriptor is always opened in the cache. For example, if a file is not used once in the inactive time, it will be removed. Ii. Kernel Parameter Optimization 1. Backup initial Kernel Parameters # Cp/etc/sysctl. conf/etc/sysctl. conf. bak 2. Clear Kernel Paramete

:22COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAMEsshd 769 root 3u IPv6 2281738844 0t0 TCP *:ssh (LISTEN)sshd 769 root 4u IPv4 2281738846 0t0 TCP *:ssh (LISTEN) # lsof -i :3306COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAMEmysqld 11106 mysql 10u IPv4 2340975114 0t0 TCP *:mysql (LISTEN) 4. Only open files using

China's access network technology is still developing very rapidly. At the same time, IPv6 networks have already entered the eyes of people. Many people may not understand the problems of IPv4-to-IPv6 transition. It does not matter, after reading this article, you must have gained a lot. I hope this article will teach you more things. During the transition from a mobile network to a mobile IPv6 network, IPv4