ns3--Global Routing

最新推荐文章于 2024-01-22 15:02:22 发布

caiqiiqi

最新推荐文章于 2024-01-22 15:02:22 发布

阅读量1.7k

点赞数

CC 4.0 BY-SA版权

分类专栏： sdn 文章标签： ns3 sdn

本文链接：https://blog.youkuaiyun.com/caiqiiqi/article/details/52793794

sdn 专栏收录该内容

26 篇文章

订阅专栏

本文介绍NS-3网络模拟器中的全局路由模型，该模型可在IPv4拓扑上进行预模拟静态路由计算。通过调用ns3::GlobalRouteManager::PopulateRoutingTables()初始化路由数据库并设置每个节点的静态单播转发表。该模型适用于有线拓扑，并假设所有节点彼此可达。若模拟过程中拓扑发生变化，可通过调整属性Ipv4GlobalRouting::RespondToInterfaceEvents或手动重新计算路由表来更新路由。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

原文：
https://www.nsnam.org/doxygen/group__globalrouting.html

Detailed Description

Performs pre-simulation static route computation on a layer-3 IPv4 topology.

Model

ns-3 global routing performs pre-simulation static route computation on a layer-3 IPv4 topology. The user API from the script level is fairly minimal; once a topology has been constructed and addresses assigned, the user may call ns3::GlobalRouteManager::PopulateRoutingTables() and the simulator will initialize the routing database and set up static unicast forwarding tables for each node.

The model assumes that all nodes on an ns-3 channel are reachable to one another, regardless of whether the nodes can use the channel successfully (in the case of wireless). Therefore, this model should typically be used only on wired topologies. Layer-2 bridge devices are supported. API does not yet exist to control the subset of a topology to which this global static routing is applied.

If the topology changes during the simulation, by default, routing will not adjust. There are two ways to make it adjust.

Set the attribute Ipv4GlobalRouting::RespondToInterfaceEvents to true
Manually call the sequence of GlobalRouteManager methods to delte global routes, build global routing database, and initialize routes. There is a helper method that encapsulates this (Ipv4GlobalRoutingHelper::RecomputeRoutingTables())