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Integrated Cisco IOS
Software features
for bandwidth
optimization

• Bandwidth aggregation of up to 4 Gbps (two ports full duplex) through Cisco Gigabit

EtherChannel technology and up to 16 Gbps (eight ports full duplex) through Fast
EtherChannel technology enhances fault tolerance and offers higher-speed aggregated
bandwidth between switches, to routers and individual servers. Port Aggregation Protocol
(PAgP) is available to simplify configuration.

• VLAN1 minimization allows VLAN1 to be disabled on any individual VLAN trunk link.

• Per-port broadcast, multicast, and unicast storm control prevents faulty end stations from

degrading overall system performance.

• Per virtual LAN (VLAN) Spanning Tree Plus (PVST+ allows for Layer 2 load sharing on

redundant links, to efficiently use the extra capacity inherent in a redundant design.

• IEEE 802.1s Multiple Spanning Tree Protocol (MSTP) allows a spanning-tree instance per

VLAN, enabling Layer 2 load sharing on redundant links.Internet Group Management
Protocol version 3 (IGMPv3) snooping provides for fast client joins and leaves of multicast
streams, and limits bandwidth-intensive video traffic to only the requestors. Multicast
VLAN Registration MVR, IGMP filtering, and fast-join and immediate leave are available as
enhancements. The number of IGMP groups can be limited with IGMP throttling. IGMP
Snooping time can be adjusted to optimize the performance of multicast data flows.

• VLAN Trunking Protocol (VTP) pruning limits bandwidth consumption on VTP trunks by

flooding broadcast traffic only on trunk links required to reach the destination devices.
Dynamic Trunking Protocol (DTP) enables dynamic trunk configuration across all ports on
the switch.

• MVR continuously sends multicast streams in a multicast VLAN while isolating the streams

from subscriber VLANs for bandwidth and security reasons.

• Supports additional frame formats: Ethernet II (tagged and untagged), 802.3 (SNAP

encapsulated, tagged and untagged frames).

Network security
features

• Filtering of incoming traffic flows based on Layer 2, Layer 3, or Layer 4 ACPs prevents

unauthorized data flows.

– The following Layer 2 ACPs or a combination can be used for security classification of

incoming packets: source MAC address, destination MAC address, and 16-bit Ethertype.

– The following Layer 3 and Layer 4 fields or a combination can be used for security

classification of incoming packets: source IP address, destination IP address, TCP source
or destination port number, UDP source, or destination port number. ACLs can also be
used to filter based on DSCP values.

– Time-based ACLs allow configuration of differentiated services based on time periods.

Product Features and Benefits