Cisco Catalyst 4948 48 10/100/1000 ports & 4 SFP, EMI WS-C4948-E 데이터 시트
제품 코드
WS-C4948-E
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Layer 2–4 hardware-based switch engine (application-specific integrated circuit [ASIC]-based)
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Unicast and multicast routing entries: 32,000
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Support for 2048 active VLANs and 4096 VLAN IDs per switch
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Layer 2 multicast addresses: 16,384
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MAC addresses: 32,768
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Policers: 512 ingress and 512 egress
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ACL or quality-of-service (QoS) entries: 32,000
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Uplinks: 4 alternatively wired SFP ports with (Gigabit EtherChannel) support
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Latency: 6 microseconds for 64-byte packets
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Switched virtual interfaces (SVIs): 2048
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STP instances: 1500
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Internet Group Management Protocol (IGMP) snooping entries: 8000
Layer 2 Features
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Layer 2 hardware forwarding at 72 Mpps
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Layer 2 switch ports and VLAN trunks
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IEEE 802.1Q VLAN encapsulation
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Inter-Switch Link (ISL) VLAN encapsulation
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Dynamic Trunking Protocol (DTP)
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VLAN Trunking Protocol (VTP) and VTP domains
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Per-VLAN Spanning Tree Protocol (PVST+) and Per-VLAN Rapid Spanning Tree Protocol (PVRST)
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Spanning-tree PortFast and PortFast guard
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Spanning-tree UplinkFast and BackboneFast
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802.1s
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802.1w
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Spanning-tree root guard
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Cisco Discovery Protocol
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IGMP snooping v1, v2, and v3
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802.3ad
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Cisco EtherChannel
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technology, Cisco Fast EtherChannel technology, and Cisco Gigabit EtherChannel technology support
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Port Aggregation Protocol (PAgP)
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Unidirectional Link Detection Protocol (UDLD) and aggressive UDLD on the SFP ports
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Q-in-Q in hardware
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Layer 2 protocol tunneling