Currently browsing tag

ipv6

Tunnel Interfaces

1. Tunnel Modes A tunnel makes two distant devices appear directly connected over a logical interface. When a packet is sent out on the tunnel interface, it is encapsulated in the “carrier” protocol and sent over a physical interface.The most used carrier protocols are GRE, IP-in-IP and IPv6, and this …

Interconnecting IPv6 and IPv4

1. Dual Stack Dual Stack means running both IPv4 and IPv6 on the same interface. This doesn’t mean they are actually interconnected, just that they can both run at the same time on an interface. 2. Tunnels 2.1 Manual Tunnels 2.1.1 IPv6 in IP Tunnels IPv6 can be encapsulated in …

IPv6 Multicast

1. IPv6 Multicast Addressing FF00::/8 Multicast addresses represent a group of interfaces, just like in IPv4 multicast. The format of a multicast address is: Flags: The R Flag is used for addresses with an embedded RP. The P Flag indicates a multicast address that is assigned based on the network …

IPv6 Routing

1. Enable IPv6 Routing To enable IPv6 routing, use: This will enable the router to send RAs unsolicited or in response to RS messages. 2. Static Routing To see the routing table, use: 3. RIP for IPv6 RIP for IPv6, aka RIPng, works just like RIPv2 for IPv4. It sends …

IPv6-101

1. IPv6 Packet Format The IPv6 header has a fixed format (as opposed to the variable format of IPv4) of 40 Bytes. Version – 4 bits – always set to the value 6 Traffic Class – 8 bits – 6 most significat bits are used for DSCP, 2 least significant bits are used …

Routing over Frame Relay

1. Topologies 1.1 Full Mesh The simplest Frame Relay topology is the Full Mesh topology, where each router has a dedicated virtual circuit to another router. Unfortunately this design is rarely found in real life because each additional circuit costs. Of course, having so many circuits available makes it easy …