cisco multicast troubleshooting

Technorati labels: CISCO, multicast, multicast, RPF, CCIE RPF, reverse path forwarding. It is an important foundation for multicast forwarding. Only after successful RPF detection can multicast traffic be correctly forwarded in the network. When you query the keyword "

details can refer to the documentation: a very strong CCIE note. CISCO CCIE Routing and Switching–kaka ' s note Author: Fang Zhiyong Personal Understanding: Now my understanding of DR is that if a LAN has multiple routers at the same time, then in show ip Pim neighbor, for the LAN will also elect a Dr out. When the client sends an IGMP message, it has nothing to do with the PC's default gateway, and the IGMP answer is sent to all upstream routers

Release date:Updated on: Affected Systems:Cisco IOS 15.xUnaffected system:Cisco IOS 15.2 (2) T1Cisco IOS 15.1 (4) M3aCisco IOS 15.1 (4) M2Cisco IOS 15.1 (2) GC2Cisco IOS 15.0 (1) M8Description:--------------------------------------------------------------------------------Bugtraq id: 52759Cve id: CVE-2012-0382 MSDP is a protocol used to connect multiple PIM-SM domains, allowing multicast sources in a group to make all RP in different domains known. Wh

between the named ACL and the numbered ACL: The named ACL has a logical name, which can delete a single row in the named ACL. Ip access-list extended Example-Named-ACL Deny tcp any eq echo Deny tcp any eq 37 Permit udp host 172.16.10.2 any eq snmp Permit tcp any Chapter 4 troubleshooting of TCP/IP Routing Protocol 1. Default Gateway If the destination address of the package is not in the router routing table, if the router is configured with the defa

(Config-router) #exitIf this is all configured, then use the ping command to test it!Here is a start-up-configuring HSRP Hot Spares:Configure on the active three-layer switch:Switch (config) #interface vlan 1Switch (config-if) #standby 1 IP 192.168.1.254Switch (config-if) #standby 1 priority 200Switch (config-if) #standby 1 track fastethernet 0/2Switch (config-if) #standby 1 preemptConfigure on the backup layer three switch:Switch (config) #interface vlan 1Switch (config-if) #standby 1 IP 192.1

transmission rate does not exceed the target receiving rate. It is achieved by setting a window size for transmission; Error Control: ensure that the received data is continuous and there is no error. If there is a lost or lost PDU, no ACK packet is sent. Connection-oriented protocols include ATM, TCP, Novell SPX, and Apple Talk ATP; 2. Non-connection protocols Connection settings and termination are not included, and no throttling or error control is available. Non-connection protocols include

Cisco Fabric Manager is a Web-based, easy-to-use, responsive application that can be used to manage switches and networks in an integrated manner, thus simplifying the storage lan san) management of Cisco MDS 9000 series switches. Cisco Fabric Manager provides network-level management functions for storage administrators, including identification, multi-Switch co

1. Troubleshooting)Here we will introduce the hardware and software problems that may occur when using vrouters. During the networking process, such as X.25, FR, DDN, DDR, TCP/IP, problems encountered in different network environments such as interconnection with IBM large hosts and solutions .? Troubleshooting tool? What is the Troubleshooting of TCP/IP connecti

I. troubleshooting commands 1. show command:1) Global commands:Show version; displays the system hardware and software versions, DRAM, flashShow startup-config; displays the configuration content written into NVRAMShow running-config; displays the currently running configuration contentShow buffers; Detailed output buffer name and sizeShow stacks; provides the router process and processor utilization information, using Stack decodeShow tech-support;

SYSTEM image according to the boot system command settings in the startup configuration, if this command is not set, the operating system image is loaded from the system image on a default network server. When the 6th-bit value is 1, the configurations in NVRAM are ignored when the vro starts. For example: 0x0: the operating system image is not automatically loaded, but enters the ROM monitor mode and waits for the user to enter the command (for example, if the command fails in the pre

When data transmission on the LAN fails, it is often difficult to determine whether it is a link fault or a port fault. Therefore, troubleshooting and isolation are required to fix faults. The following describes the simple judgment process:Take the 3700/2900 series switch as an example. On the 3700/2900 switch, it is already an IOS operating system. If a problem occurs during port transmission, run the following command on the vswitch:Sh controller E