Network Study Site

IPSec Static VTI with GRE

2023 Mar 9

IPSec Static VTI with GRE IPSec stands for Internet Protocol Security and includes a group of protocols working together to authenticate and encrypt transmission of data across an unsecured network. For example, the internet is an unsecured network. IPSec works at the OSI Model Layer-3 ...

IPSec VPN with Crypto Map

2023 Mar 8

IPSec VPN with Crypto Map A crypto map is a method to configure a site-to-site policy-based encrypted IPSec VPN connection. A policy-based VPN uses an Access-Control List (ACL) to filter traffic intended for encryption. In other words, the ACL specifies a policy that decides whether to send traffic through the IPSec connection ...

IS-IS NET address

2023 Mar 7

IS-IS NET address The IS-IS NET address uniquely identifies a device within an IS-IS topology and assigns specific characteristics to that device. For example, the NET address encodes the area ID and the system ID which are used by routers to build an IS-IS topology ...

L3VPN MPLS Per-VRF TE

2023 Mar 6

L3VPN MPLS Per-VRF TE In an MPLS L3VPN architecture traffic types may be grouped into different VRF instances. This means, a single customer may deploy multiple VRFs for various QoS classes or based on application requirements. Differentiation based on VRFs can also be implemented in the MPLS backbone ...

IS-IS IPv6

2023 Mar 4

IS-IS IPv6 IS-IS supports IPv4 and IPv6 with the core routing mechanisms identical for both protocols. Features such as authentication, redistribution, metrics, and route summarization are available in both address-families. Additionally, IS-IS supports dual stack networks and multiple topologies ...

DHCPv6 Prefix Delegation (PD)

2023 Mar 2

DHCPv6 Prefix Delegation (PD) DHCPv6 Prefix Delegation is a method to assign an IPv6 subnet to a subscriber location's router which can configure itself and advertise the assigned subnet to connected hosts. In turn, the hosts can use the received subnet to assign themselves a unique IPv6 address with SLAAC ...

LISP Introduction

2023 Feb 23

LISP Introduction LISP is a network architecture that creates two separate address spaces: the EID space, and the RLOC space. Multiple EID spaces are connected to a common RLOC space. Ingress and Egress Tunnel Routers (ITR/ETR) separate the EID space from the RLOC space ...

NAT64

2023 Feb 22

NAT64 NAT64 is a type of network address translation (NAT) that enables IPv6-only hosts access to an IPv4-only network. NAT64 supports the transition from IPv4 to IPv6 by enabling pockets of IPv6 devices access to an IPv4-only network. A router creates a NAT64 /96 prefix and appends a 32-bit IPv4 address in hexadecimal ...

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