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The ASIC layout shown in Figure 8 for the data center focused 6600-24G-4XG switch adds an NGX ASIC to
provide a 10-Gb uplink capability to this switch model. Unlike the 3500yl-24G switch, where the yl 10-Gb
module is rear mounted, the 6600-24G-4XG switch moves the 10-Gb ports to the front of the switch for
simplified cabling.
Examining the Gigabit ports, the last four ports are dual personality, meaning they can be used as RJ-45
copper ports or mGBIC (or SFP) fiber ports. The 6600-24G-4XG switch offers four ports of 10-Gb using SFP+
port slots—instead of X2 slots used on earlier 10-Gb HP networking products. There is no CX4 option for these
SFP+ products, but HP networking offers a low-cost copper direct attach cable (or DAC) option that is based
on the Small Form Factor Committee (SFF-8431) standard. The DACs are essentially a preterminated cable
with SFP+ compatible transceivers. DAC products are available in 1-, 3-, and 7-m lengths, primarily for close
proximity connections to 10-Gb servers or other SFP+ switches, such as in the same server cabinet. The 6600
accessories portion of this guide provides further details about the direct attach options.
The fabric-switching capacity is listed the same as the 3500yl-24G switch, where we account for the added
NGX ASIC and its maximum capacity of 28.8 Gbps of throughput. Table 2 compares the 6600-24G/24G-4XG
architectures to that of the 3500yl-24G and 2910al-24G switches.
2910al-24G 6600-24G 6600-24G-4XG 3500yl-24G
Rack height 1U 1U 1U 1U
1-Gb RJ-45 24 24 24 24
1-Gb SFP 4* 4* 4* 4*
10-Gb SFP+ 4 (2 X2/2 CX4) – 4 4 (2 X2/2 CX4)
Max. 1-Gb wire-speed ports 24 24 24 24
Max. 10-Gb wire-speed ports 4 – 2 2
Management console port RJ-45 Serial DB-9 Serial DB-9 Serial DB-9
10-Gb port buffering 6 MB** – 18 MB 4.5 MB
Out-of-band mgmt. port – – – –
Power save option – – – –
Power supply 1 internal PS
(external PS option)
2 internal PS slots
(ships with 1 PS)
2 internal PS slots
(ships with 1 PS)
1 internal PS
(external PS option)
Routing/Switching capacity 128.0 Gbps 48.0 Gbps 101.8 Gbps 101.8 Gbps
Fabric capacity 128.0 Gbps 48.0 Gbps 105.6 Gbps 105.6 Gbps
Switch throughput 95.2 mpps 35.7 mpps 75.7 mpps 75.7 mpps
MAC address entries 16K 64K 64K 64K
ACL entries 0.5K 3K 3K 3K
Routing table entries 2K 10K 10K 10K
* Dual-personality ports
** 16-MB shared across all 1-Gb and 10-Gb ports
Table 2: 6600-24G/24G-4XG switches vs. 2910al-24G and 3500yl-24G switches
Ports
•24 10/100/1000Base-T RJ-45 connectors
•4 dual-personality 1-GbE SFP (can be used in lieu of last 4 10/100/1000Base-T ports)
•4 10-GbE SFP+ ports (10-GbE-only speeds)
•SFP and SFP+ slots are not interchangeable and only support HP networking-branded optics
Management connectivity
•DB-9 serial console port