Linux Networking Copyright 2017 Mirantis Inc All rights

Linux Networking Copyright © 2017 Mirantis, Inc. All rights reserved

L 2. Frame ● Frame overhead = MAC Header(14 bytes) + CRC Checksum (4 bytes) = 18 bytes ● 802. 1 Q (4 bytes) - опциональный заголовок ● Ethertype(Ethernet 2) - служит для идентификации протокола инкапсулированого в Payload фрейма (IPv 4, IPv 6) 2017 | www. mirantis. com

HOW-TO 1. ip link show ${interface_name} 2. ip link set address ${new_mac} ${interface_name} 2017 | www. mirantis. com

HOW-TO 1. vconfig add ${interface_name} ${tag_id} 2. vconfig rem ${interface_name}. ${tag_id} 2017 | www. mirantis. com

L 3. IP packet ● Packet overhead = 5 * 4 header octets = 20 bytes 2017 | www. mirantis. com

Protocols encapsulation 2017 | www. mirantis. com

HOW-TO 1. ip addr show ${interface_name} 2. ifconfig ${interface_name} ${ip_addr}/${netmask} 2017 | www. mirantis. com

HOW-TO 1. ip route show 2. ip route add ${ext_net} via ${ip_from_dev_net} dev ${dev} 2017 | www. mirantis. com

HOW-TO 1. ip route del ${net} via ${ip_from_dev_net} dev ${dev} 2. route add default gw ${ip} 2017 | www. mirantis. com

HOW-TO 1. /etc/network/interfaces - interfaces L 3 configuration 2017 | www. mirantis. com

L 4. TCP segment ● Segment overhead = 5 * 4 header octets = 20 bytes 2017 | www. mirantis. com

HOW-TO 1. /etc/resolv. conf - DNS configuration 2. netstat - processes <-> ports stats 2017 | www. mirantis. com

HOW-TO 1. ifconfig ${iface_name} mtu ${mtu_size} up 2017 | www. mirantis. com

Links Packet switching (L 2 layer) https: //en. wikipedia. org/wiki/Packet_switching VLAN http: //xgu. ru/wiki/VLAN_%D 0%B 2_Linux Routing http: //linux-ip. net/html/routing-intro. html 2017 | www. mirantis. com

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