Name resolution for IPv6 addresses can be static or dynamic. Just as with IPv4, resolution of static names to IPv6 addresses can be manually configured in the host configuration file. […]
DHCPv6 – Internet Protocol Version 6 (IPv6) Design
Dynamic Host Configuration Protocol version 6 (DHCPv6) is an updated version of DHCP that provides dynamic IP address assignment for IPv6 hosts. DHCPv6, described in RFC 3315, provides the same […]
Whole IPv4 Address Linked to IPv6 – Internet Protocol Version 6 (IPv6) Design
Another method of IPv6 address allocation is to link a whole IPv4 address to the lowest significant bits of the IPv6 address. Table 2-11 shows an example using the same […]
IPv6 Deployment Models – Internet Protocol Version 6 (IPv6) Design
Deployment of IPv6 can be done in one of the following models: Dual-Stack Model In the dual-stack model, devices and the network routers and switches all run both IPv4 and […]
Link-State Routing Protocols – Routing Protocol Characteristics, EIGRP, and IS-IS
Link-state routing protocols address some of the limitations of distance-vector protocols. When running a link-state routing protocol, routers originate information about themselves (IP addresses), their connected links (the number and […]
Classless Versus Classful Routing Protocols – Routing Protocol Characteristics, EIGRP, and IS-IS
Routing protocols can be classified based on their support of variable-length subnet masking (VLSM) and classless interdomain routing (CIDR). Classful routing protocols do not advertise subnet masks in their routing […]
Administrative Distance – Routing Protocol Characteristics, EIGRP, and IS-IS
On Cisco routers running more than one routing protocol, it is possible for two different routing protocols to have a route to the same destination. Cisco routers assign each routing […]
Poison Reverse – Routing Protocol Characteristics, EIGRP, and IS-IS
Poison reverse is a route update sent out an interface with an infinite metric for routes learned (received) from the same interface. Poison reverse simply indicates that the learned route […]
EIGRP Components – Routing Protocol Characteristics, EIGRP, and IS-IS
EIGRP is characterized by four components: You should know the role of the EIGRP components, which are described in the following sections. Protocol-Dependent Modules EIGRP uses different modules that independently […]
DUAL – Routing Protocol Characteristics, EIGRP, and IS-IS
EIGRP implements DUAL to select paths and guarantee freedom from routing loops. J. J. Garcia Luna-Aceves developed DUAL, which is mathematically proven to result in a loop-free topology, providing no […]