switch igmp snooping

In the previous two sections, we analyzed the IGMP snooping process based on the IGMP snooping code implemented in linux2.6.32. This section analyzes the functionality required to implement IGMP snooping based on the first two sec

Original link http://louisnetwork.blog.sohu.com/111972027.html Some tests involve IGMP snooping at work. When it comes to IGMP snooping, it is inevitable that IGMP proxy will come to mind. Sometimes, you may think more and think more about it.What is the difference between

At present, in the IP network, the operator's network to provide more services for the purpose, no longer in the form of xDSL to provide users, but directly provide a unified width interface, in some broadband community this form is particularly common. At present, in the broadband community to apply the most in addition to Internet services, more is to provide IPTV applications. In the promotion of IPTV, for the involved access layer switching equipment, the device is generally required to supp

multicast group is found locally, the proxy will send an application to the upstream router and create a multicast group locally. When a multicast member exits, the proxy also checks whether other multicast members exist in the multicast group. If yes, then, it only deletes the members applying to withdraw from the multicast group. Otherwise, it notifies the upper-end router to cancel the multicast group. Therefore, the above two application solutions have their own advantages and disadvantages

network C-BSR, router A after the 130s boot timer expires, become BSR, at 60s intervals to the network to announce bootstrap messages; If there is a competition C-BSR in the network, router A will compare priority (priority equality compared IP address greater priority), if the priority is low, Router A resets the boot timer to continue listening if priority high Router a becomes BSR after the 130s boot timer expires. Visible high-priority C-BSR can preempt, preemption delay of 130s.Problem 2:1

Huawei S5720 three layer switch (Huiju), a two-layer switch (S5700) for the company Jieru, and two laptops with VLC installed Media Player.1) The whole network routing can be reached between RP_BSR and Huiju through OSPF;2) RP_BSR and Huiju establish PIM SM neighbor, note: RP_BSR F0/1 must open PIM, otherwise RP_BSR can not forward the group broadcast text;3) RP_BSR configuration c-rp for 224.0.0.0/4, C-BS

Take a look at the diagram below, L2 switch turns on IGMP snooping,router1 is a remote multicast router that forwards multicast packets with the PIM protocol. PIM, Protocol-Independent Multicast is a family of multicast routing protocols that can provide one-to-many and many-to-many distribution of data over the Internet. The "protocol-indepen

can quickly find its associated multicast group database entries U32 queries_sent;//the number of times a query package has been sent }; Where the port list is used to add all the corresponding bridges to the addr of the multicast group Next points to the next multicast port, and the next multicast group address is addr, only the port value is different. Where mglist is used to add the multicast port to the Mglist linked list of port, through the mglist linked list of the bridge port, can find

----------- --------------------------------------------------------GI1/0/1 Ip-mac INACTIVE-NO-SNOOPING-VLANGI1/0/2 Ip-mac Active Deny-all deny-all 24GI1/0/3 Ip-mac INACTIVE-NO-SNOOPING-VLANGI1/0/4 Ip-mac Active Deny-all deny-all 24GI1/0/5 Ip-mac Active Deny-all Deny-all 24GI1/0/6 Ip-mac Active deny-all deny-all 24GI1/0/7 ip-mac AC tive 172.16.24.150 a4:4c:c8:10:63:ee 24gi1/0/8 ip-mac I

In the previous article, we have explained the DHCP Server settings and DHCP Relay settings of the H3C switch. Here we will explain the last part -- DHCP Snooping configuration of the H3C switch. H3C switch DHCP Snooping configuration 1> Configure Environment Parameters 1. T

1. DHCP spoofing attacks 1. a DHCP attacker can also provide SERVER services in a VLAN. 2. DHCP attackers will respond to the DHCP Client's sending request information. 3. attackers will allocate IP addresses and other information and default gateways to DHCP clients. Note: Multiple DHCP servers in a VLAN may cause Address allocation conflicts. Ii. DHCP spoofing attack (DHCP SnoopingDHCP listener) 1. DHCP Snooping allows you to configure the trusted

Use VLC media Player to send multicast data to verify that the switch IGMP settings were successful.Linkhttp://peakdrive.com/?p=440http://www.dasblinkenlichten.com/setting-up-a-multicast-lab-using-vlc-2-0-5/The multicast IP address is a Class D address that requires multicast to be sent when validating. Follow the link settings to set up multicast with VLC player to play the selected dispatches. On other co

Test topologyEnvironment: DHCP server and DHCP clients belong to the same VLAN, but clients belong to different switches, and the L2 and L3 switches turn on DHCP snooping to concludeconfiguration of the L3 switch172.28.27.0 255.255.255.0172.28.27.254 172.28.28.15 ! ! 27IP DHCP snooping information option allow-untrusted //must add this command because the L3

message are correctIf a large number of messages are sent, the network bandwidth will be exhausted to form another Denial-of-Service attack.3. The client can specify the IP address at will.The client does not have to use the DHCP service. It can set IP addresses in a static way. If any,This will greatly increase the possibility of network IP address conflict.II. Introduction to DHCP Snooping TechnologyDHCP Snoopi