Cisco Systems 2950 - page 37

1-3
Catalyst2950 and Catalyst2955 Switch Software Configuration Guide
78-11380-10
Chapter1 Overview Features
•Hot Standby Router Protocol (HSRP) for command-switch redundancy. The redundant command
switches used for HSRP must have compatible software releases.
Note See the “Advantages of Using CMS and Clustering Switches” section on page 1-9. For the CMS,
software, and browser requirements and for the cluster hardware and software requirements,
refer to the Chapter 4, “Getting Started with CMS,” and the release notes.
Performance
•Autosensing of speed on the 10/100 and 10/100/1000 ports and autonegotiation of duplex mode on
the 10/100 ports for optimizing bandwidth
•IEEE 802.3x flow control on Gigabit Ethernet ports operating in full-duplex mode
•Fast EtherChannel and Gigabit EtherChannel for enhanced fault tolerance and for providing up
to2 Gbps of bandwidth between switches, routers, and servers
•Support for frames larger than 1500 bytes. These switches support frame siz es from 15 00 to
1530 bytes:
– Catalyst 2950G-12-EI, 2950G-24-EI, 2950G-24-EI-DC, and 2950G-48-EI switches running
Cisco IOS Release 12.1(6)EA2 or later
– Catalyst 2950 LRE switches
– Catalyst 2955 switches
•Port blocking on forwarding unknown unicast and multicast traffic (available only on the
Catalyst LRE switches and on the Catalyst 2950G-12-EI, 2950G-24-EI, 2950G-24-EI-DC,
2950G-48-EI, and 2955 switches)
•Per-port broadcast storm control for preventing faulty end stations from degrading overall system
performance with broadcast storms
•Port Aggregation Protocol (PAgP) and Link Aggregation Control Protocol (LACP) for automatic
creation of EtherChannel links
•Internet Group Management Protocol (IGMP) snooping for IGMP versi ons 1, 2 , and 3 to l imit
flooding of IP multicast traffic
•IGMP report suppression for sending only one IGMP report per multicast router query to the
multicast devices (supported only for IGMPv1 or IGMPv2 queries)
•Multicast VLAN registration (MVR) to continuously send multicast streams in a multicast VLAN
while isolating the streams from subscriber VLANs for bandwidth and security reasons
•IGMP filtering for controlling the set of multicast groups to which hosts on a switch port can belong
•IGMP throttling for configuring the action when the maximum number of entries is in the IGMP
forwarding table
•Protected port (private VLAN edge port) option for restricting the forwarding of traffic to designate d
ports on the same switch
•Dynamic address learning for enhanced security
Manageability
•Cisco Intelligence Engine 2100 (IE2100) Series Cisco Networking Services (CNS) embedded
agents for automating switch management, configuration storage and delivery (available only with
the EI)
•DHCP-based autoconfiguration for automatically configuring the switch du ring star tup w ith IP
address information and a configuration file that it receives during DHCP-based autoconfiguration