Datasheet

Data Sheet
© 2011 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information. Page 4 of 9
Intelligent Network Services with QoS and Sophisticated Traffic Management
The Cisco Catalyst 4948E and 4948E-F offer superior per-port QoS features to help ensure that network traffic is
classified, prioritized, and scheduled optimally to efficiently manage bandwidth-intensive multimedia and time-
sensitive and mission-critical applications. The Cisco Catalyst 4948E and 4948E-F can classify, monitor, and mark
incoming packets, allowing the administrator to differentiate traffic flows and enforce policies. Sharing, shaping, and
strict-priority configurations determine the scheduling of egress traffic. The Cisco Catalyst 4948E and 4948E-F also
support DBL, a congestion-avoidance feature. For details about the QoS features, including active queue
management through DBL on the Cisco Catalyst 4948E and 4948E-F, refer to the Cisco Catalyst 4500 Series
Supervisor Engine QoS overview at
http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps4324/prod_white_paper0900aecd8041691c.html.
Cisco Catalyst 4900 Series Features
Table 1 summarizes the main features of the Cisco Catalyst 4900 Series Switches.
Table 1. Main Features of Cisco Catalyst 4900 Series Switches
Feature and Description Cisco Catalyst 4948
Switch
Cisco Catalyst 4948 10
Gigabit Ethernet Switch
Cisco Catalyst 4900M
Switch
Cisco Catalyst 4948E and
4948E-F Switches
Environmental
Height 1RU 1RU 2RU 1RU
Dimensions (H x W x D) 1.71 x 17.3 x 16.1 in. (4.3 x
43.9 x 40.9 cm)
1.71 x 17.3 x 16.1 in. (4.3 x
43.9 x 40.9 cm)
3.5 x 17.2 x 17.9 in. (8.9 x
43.7 x 45.5 cm)
1.75 x 17.5 x 19.4 in. (4.4 x
44.4 x 49.3 cm)
Power redundancy 1+1 AC or DC 1+1 AC or DC 1+1 AC or DC 1+1 AC or DC
Unit weight 16.5 lb (7.48 kg) 16.5 lb (7.48 kg) 34.0 lb (15.4 kg) 19 lb (8.62 kg)
Hot-swappable fan Yes Yes Yes Yes
Average and maximum
power consumption (in
watts [W])
176W average
300W maximum
212W average
300W maximum
300W average
446W maximum
230W average
275W maximum
Airflow Side to back Side to back Side to back Front to back (Cisco
Catalyst 4948E)
Back to front (Cisco Catalyst
4948E-F)
Rack-mounting options Front and rear mount Front and rear mount
High-performance rear
mount
Four-post rack-side rail
mount
High-performance mount
Front and rear mount
High-performance rear
mount
Uplink optic types Four Small Form-Factor
Pluggable (SFP) optics
Two X2 (10 Gigabit
Ethernet) optics
Eight X2 (10 Gigabit
Ethernet) optics
SFP and SFP+
Cisco
®
TwinGig Converter
Module support
No No Yes (WS-X4908-10GE only) No
Cisco OneX Converter
Module support (X2 to
SFP+)
No No Yes No
Optics LH, SX, ZX, and CWDM LR, CX4, LX4, SR, ER,
LRM, ZR, and DWDM
X2: LR, CX4, LX4, SR, ER,
LRM, ZR, and DWDM
SFP+: SR
CWDM, DWDM, SR, LR,
LRM, and CX4
Modular half-card slots 0 0 2 0
Ports
Maximum 10/100/1000-
Gbps ports
48 48 40 48
Maximum Gigabit
Ethernet (fiber) ports
4 0 32 (Cisco TwinGig
Converter Module)
4
Maximum 10 Gigabit
Ethernet (10GBASE-T)
ports
0 0 16 0
Maximum 10 Gigabit
Ethernet (fiber) ports
0 2 (X2) 24 (X2)
*
4 (SFP+)