Snooping on Protocol-Independent-Multicast (PIM) and Distance-Vector-Multicast-Routing-Protocol (DVMRP) packets

Listening to Cisco Group Management Protocol self-join packets from other routers

Statically connecting to a multicast router port with the ip igmp snooping mrouter command

You can configure the switch to either snoop on PIM/DVMRP packets or to listen to Cisco Group Management Protocol self-join packets. By default, the switch snoops on PIM/DVMRP packets on all VLANs. To learn of multicast router ports through only Cisco Group Management Protocol self-join packets, use the ip igmp snooping vlan vlan_id mrouter learn cgmp global configuration command. When this command is used, the router listens only to Cisco Group Management Protocol self-join packets and no other Cisco Group Management Protocol packets. To learn of multicast router ports through only PIM/DVMRP packets, use the ip igmp snooping vlan vlan_id mrouter learn pim-dvmrpinterface command.

Q. How granular can the rate limiting policing be set?

A. The granularity of policers is 1 Mbps on Fast Ethernet ports and 8 Mbps on Gigabit Ethernet ports. The Cisco Catalyst 2955 supports 6 policers on 10/100 ports and up to 60 policers on Gigabit Ethernet ports. Please note that this feature is available on the Cisco Catalyst 2955T, 2955C, and 2955S switches.

Q. Is rate limiting supported? Is traffic shaping supported?

A. Rate limiting is supported. Traffic shaping is not supported.

Q. What are the default CoS values on the Cisco Catalyst 2955?

A. The default CoS values are shown in Table 3.

Table 3 Default CoS Values

CoS Value

CoS Priority Queue

 

 

0,1

1

 

 

2,3

2

 

 

4,5

3

 

 

6,7

4

 

 

Q. What are the configurable ranges for Weighted Round Robin (WRR) bandwidth allocation to all queues of transmission?

A. WRR scheduling can be enabled to avoid starvation of frames in lower-priority queues by providing configurable bandwidth allocation, using a number of 1-255 per queue.

Q. Can IGMP snooping and QoS on the Cisco Catalyst 2955 be configured via Cisco CMS Software?

A. Yes. Cisco IOS Software Release 12.0(5)WC1 supports configuration of both IGMP snooping and QoS via Cisco CMS, using simple point-and-click menus for enabling and disabling the features, as well as configuring parameters.

Q. Does the Cisco Catalyst 2955 support the 802.3ad Port Grouping standard?

A.Yes.

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Cisco Systems 2955 specifications CoS Value CoS Priority Queue

2955 specifications

The Cisco Systems 2955 series, a robust family of integrated services routers, symbolizes versatility and reliability for businesses in need of scalable networking solutions. Designed to provide a seamless connection for enterprise branches, the 2955 series is engineered for superior performance, security, and low operational costs, making it an ideal choice for businesses aiming for efficiency.

One of the standout features of the Cisco 2955 is its modular design, which allows for the customization of WAN and LAN interfaces. This flexibility enables enterprises to adapt their networking capabilities as their requirements evolve. The router supports a variety of interface types, including Serial, T1/E1, and EtherSwitch, providing solutions for diverse applications and ensuring compatibility with a wide range of network deployments.

A key technology incorporated into the 2955 is Cisco IOS Software, which delivers advanced routing, switching, and security features. This operating system is foundational for managing network traffic efficiently and ensures high availability, security, and performance. The router also supports Voice over IP (VoIP) applications, facilitating improved communication across the enterprise by enabling businesses to combine voice and data traffic over a single network.

Security is paramount in modern networking, and the Cisco 2955 series does not disappoint. Integrated security features, such as VPN support, firewall capabilities, and intrusion prevention, provide a comprehensive approach to protecting enterprise networks from threats. The router also supports secure access methods, ensuring that only authorized users can connect to the network.

In addition, the Cisco 2955 is designed with enhanced management features. The integration of tools for network monitoring and troubleshooting simplifies the management of complex network environments, enabling IT teams to maintain optimal performance and quickly resolve issues.

With support for Power over Ethernet (PoE), the 2955 can power connected devices directly through the Ethernet cables, reducing the need for separate power sources and simplifying deployment for devices like IP phones and wireless access points. This capability enhances the overall efficiency of network infrastructure while contributing to a reduction in operational costs.

In summary, the Cisco Systems 2955 series stands out as a powerful and flexible router solution for enterprises seeking reliability and advanced features. With its modular design, integrated security, and support for various network technologies, the 2955 enables organizations to build robust and scalable networks that can adapt to the evolving demands of their operations.