pim dense-mode , sparse-mode , ssm dense-mode 多播router之间用的是pim协议,host与多播router之间用的是IGMP协议,dense-mode是router收到multicast traffic之后,首先会检查下进端口的那个multcast source地址是否在IP TALBE上对应那个端口,如果对应,然后就四散到其他端口,如果有些机器不要的,会在收到后发送拒绝信...
dense-mode是最简单的,无需RP选举,在global模式输入ip multicast-routing,然后在各端口输入ip pim dense-mode即可。 一个节点路由器会通过igmp来发现下游到底还要不要这种multicast,不要的话会马上通知上游节点别发多播信息来了。而再上一级的路由器收到这个拒绝信息之后,是不是永远都不再发多播信息来呢?不是的,...
My question is why is an RP always needed in sparse-dense-mode whether through Auto-RP or statically. It seems like regular client multicast traffic would fall back to dense mode if there wasnt an RP enabled. Although, I know its not considered as efficient, multicast traffic should still ...
interface GigabitEthernet3/0/25 no switchport ip address 3.1.1.2 255.255.255.248 ip pim sparse-dense-mode ! ! !--- Output suppressed. ! ! interface GigabitEthernet9/0/24 no switchport ip address 10.1.1.1 255.255.255.0 ip pim passive no keepalive ! ! !--- Output suppressed. ! ! interfac...
interface GigabitEthernet0/0.206 encapsulation dot1Q 206 ip address 192.168.103.61 255.255.255.0 ip pim sparse-dense-mode <-- The interface participates in multicast routing ip ospf 1 area 0 ! interface GigabitEthernet0/0.207 encapsulation dot1Q 207 ip address 192.168.104.61 255.255.255.0 ip p...
Protocol Independent Multicast-Sparse Mode ASM model Large-scale network where multicast group members are distributed sparsely An MDT is set up when receivers join a multicast group. PIM-SM needs to maintain an RP, set up an RPT, and register a multicast source. SSM model Scenarios where ...
SSM模型是借助PIM-SM的部分技术和IGMPv3/MLDv2来实现的,无需维护RP、无需构建RPT、无需注册组播源,可以直接在源与组成员之间建立SPT。 SSM的特点是网络用户能够预先知道组播源的具体位置。因此用户在加入组播组时,可以明确指定从哪些源接收信息。组成员端DR了解到用户主机的需求后,直接向源端DR发送Join报文。Join报...
IP PIM Sparse-Dense-Mode IPPIMSparse-Dense-Mode2011-01-3015:09:57|分类：CISCO|标签：rpsparsedensemodepim|字号大中小订阅. 最近在研究Multicast,觉得很有意思，因为它完全不同于Unicast的各种协议，虽然也有MOSPF是基于OSPF开发的，但是整个组播树的建立以及包转发都跟OSPF是不同的。 谈到组播，就必须得谈...
This paper focuses on building up some models for its most common types, this is, PIM Dense Mode and PIM Sparse Mode, by using manual algebraic derivations, following the Algebra of Communicating Processes (ACP) axioms. The purpose of such models is to achieve a simplified approach, yet as...
Multicast PIM sparse mode #mulitcast#pim#sparse-mode Multicast PIM sparse-dense mode #mulitcast#pim#sparse-dense_mode Multicast PIM what triggers an assert forwarder election #multicast#pim#assert#pim_assert#forwarder#election#trigger Multicast PIM with multiple RPs #multicast#pim#rendezvous-point Mu...