Ip packet sender receiver mac#
Then, it sends (unicasts) the packet to fe1 port by referring to the MAC table where a2, the destination MAC address of the received packet, is mapped to fe3.
Upon receiving the packet, S1 (Switch 1) performs source MAC learning and records the following in the MAC table.* Target IP = 1.1.1.1, the IP address of the intended receiver (R1) * Target MAC = 00:00:00:00:00:00 (the value that SVR1 wants to find out) * Sender IP = 1.1.1.10, the IP address of the sender (SVR1) * Sender MAC = m1, the MAC address of the sender (SVR1) * Source MAC = m1, the MAC address of the sender (SVR1) * Destination MAC = FF:FF:FF:FF:FF:FF (broadcasting, so sending to all nods in the same LAN) ARP miss event), SVR1 sends an ARP request packet with the following fields to lan1 port: As the ARP table does not have a MAC address entry for the gateway whose IP address is 1.1.1.1 (i.e.This gateway is located in the same network that the server (SVR1) belongs to (In the figure, 1.1.1.1, the interface address of the first router (R1) connected to SVR1 (at 1.1.1.10) is the gateway of the server). A gateway (also known as default gateway) refers to the first router (no matter how many L2 switches there are in between) connected to a server, e.g.Then, the assigned (or configured) addresses are installed in the routing table. In case of servers, IP and gateway addresses are configured by server administrators. In case of regular PCs, IP addresses are assigned (leased) through DHCP and gateway addresses are assigned through DHCP option 3. Through routing table lookup, SVR1 finds out the destination address 2.1.1.30 is mapped to a default route (0.0.0.0/0), and thus "in order for the packet to reach the destination, it has to go to the gateway 1.1.1.1 via Outgoing Interface (OIF) lan1".SVR1 with IP address of 1.1.1.10 is trying to send a packet to the destination, SVR3 with IP address of 2.1.1.30.
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