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Router discovery is useful for accessing computer systems on other nonlocal area networks. [2] The IRDP is defined by the IETF RFC 1256 standard, [3] with the Internet Control Message Protocol (ICMP) upon which it is based defined in IETF RFC 792. IRDP eliminates the need to manually configure routing information.
Additionally, the routers will use reverse-path forwarding to ensure that there are no loops for packet forwarding among routers that wish to receive multicast packets. When a data packet is received on a non-RPF interface, a mechanism is required to prevent loops. If the non-RPF interface is a LAN, an Assert message is sent.
Linux-based router project supporting a large set of layer-1 technologies (e.g. Ethernet LAN, Wireless LAN, ISDN, DSL, UMTS), layer-3 protocols and functionality (IPv4, IPv6, stateful packet filter), and various network-related functionality (e.g. Bridging, Bonding, VLANs; DNS, DHCPv4, DHCPv6, IPv6 RA; PPP (client+server), PPTP (client+server ...
In Ethernet-based routers, MTU normally refers to the IP MTU. If jumbo frames are allowed in a network, the IP MTU should also be adjusted upwards to take advantage of this. Since the IP packet is carried by an Ethernet frame, the Ethernet frame has to be larger than the IP packet.
It then forwards the packet along to the next router in the path, which swaps the packet's outer label for another label, and forwards it to the next router. The last router in the path removes the label from the packet and forwards the packet based on the header of its next layer, for example IPv4. Due to the forwarding of packets through an ...
The main purpose of a router is to connect multiple networks and forward packets destined either for directly attached networks or more remote networks. A router is considered a layer-3 device because its primary forwarding decision is based on the information in the layer-3 IP packet, specifically the destination IP address. When a router ...
Internet Group Management Protocol (IGMP) version 3 [22]: §4.2.14 No 224.0.0.102 Hot Standby Router Protocol version 2 (HSRPv2) / Gateway Load Balancing Protocol (GLBP) No 224.0.0.107 Precision Time Protocol (PTP) version 2 peer delay measurement messaging No 224.0.0.251 Multicast DNS (mDNS) address No 224.0.0.252
The primary function of a router is to forward a packet toward its destination network, which is the destination IP address of the packet. To do this, a router needs to search the routing information stored in its routing table. The routing table contains network/next hop associations. These associations tell a router that a particular ...