[c-nsp] Basic Query: Switches

[Matthew Crocker]

http://www.cisco.com/en/US/products/hw/switches/ps646/ 
products_data_sheet09186a00800913d7.html

• Catalyst 3550-12G Switch-10 GBIC-based Gigabit Ethernet ports and  
two 10/100/1000BASE-T ports; 1.5 RU

• Catalyst 3550-12T Switch-10 10/100/1000BASE-T ports and two GBIC- 
based Gigabit Ethernet ports; 1.5 RU

The built-in Gigabit Ethernet ports accommodate a range of GBIC  
transceivers, including the Cisco GigaStack® GBIC, 1000BASE-T,  
1000BASE-SX, 1000BASE-LX/LH, 1000BASE-ZX and CWDM GBICs. The dual  
GBIC-based Gigabit Ethernet implementation on the Fast Ethernet  
configurations provides customers tremendous deployment flexibility- 
allowing customers to implement one type of stacking and uplink  
configuration today, while preserving the option to migrate that  
configuration in the future. High levels of stack resiliency can also  
be implemented by deploying dual redundant Gigabit Ethernet uplinks,  
a redundant GigaStack GBIC loopback cable, UplinkFast and CrossStack  
UplinkFast technologies for high-speed uplink and stack  
interconnection failover, and Per VLAN Spanning Tree Plus (PVST+) for  
uplink load balancing. This Gigabit Ethernet flexibility makes the  
Catalyst 3550 switches an ideal LAN edge complement to the Cisco  
Catalyst 6500 family of Gigabit Ethernet optimized core LAN switches.



• 24 Gbps switching fabric (Catalyst 3550-12G and 3550-12T), 13.6  
Gbps switching fabric (Catalyst 3550-48), 8.8 Gbps switching fabric  
(Catalyst 3550-24, 3550-24 PWR, 3550-24-DC, and 3550-24-FX)

• 12 Gbps maximum forwarding bandwidth at Layer 2 and Layer 3  
(Catalyst 3550-12G 3550-12T), 6.8 Gbps maximum forwarding bandwidth  
at Layer 2 and Layer 3 (Catalyst 3550-48), 4.4 Gbps maximum  
forwarding bandwidth at Layer 2 and Layer 3 (Catalyst 3550-24,  
3550-24 PWR, 3550-24-DC, and 3550-24-FX)

• 17.0 Mpps forwarding rate for 64-byte packets (Catalyst 3550-12G  
and 3550-12T), 10.1 Mpps forwarding rate for 64-byte packets  
(Catalyst 3550-48), 6.6 Mpps forwarding rate for 64-byte packets  
(Catalyst 3550-24, 3550-24 PWR, 3550-24-DC, and 3550-24-FX)

• 4 MB memory architecture shared by all ports (Catalyst 3550-12G,  
3550-12T, and 3550- 48), 2 MB memory architecture shared by all ports  
(Catalyst 3550-24, 3550-24 PWR, 3550-24-DC, and 3550-24-FX)

• 64 MB DRAM and 16 MB Flash memory

• Configurable up to 12,000 MAC addresses (Catalyst 3550-12G and  
3550-12T), Configurable up to 8,000 MAC addresses (Catalyst 3550-48,  
3550-24, 3550-24 PWR, 3550-24-DC, and3550-24-FX)

• Configurable up to 24,000 unicast routes (Catalyst 3550-12G and  
3550-12T), Configurable up to 16,000 unicast routes (Catalyst  
3550-48, 3550-24, 3550-24 PWR, 3550-24-DC, and 3550-24-FX)

• Configurable up to 8,000 multicast routes (Catalyst 3550-12G and  
3550-12T), Configurable up to 2,000 multicast routes (Catalyst  
3550-48, 3550-24, 3550-24 PWR, 3550-24-DC, and 3550-24-FX)

• Configurable Maximum Transmission Unit (MTU) of up to 2,000 Bytes  
for bridging of MPLS tagged frames (Catalyst 3550-12G and 3550-12T),  
Configurable Maximum Transmission Unit (MTU) of up to 1,546 Bytes for  
bridging of MPLS tagged frames (Catalyst 3550-48, 3550-24, 3550-24  
PWR, 3550-24-DC, and 3550-24-FX)




On May 27, 2005, at 9:14 AM, Gangasagar Amula wrote:

>
> Dear All,
>
> What is difference between WS-C3550-12G and WS-C3550-12T.....
>
> We are planning to purchase 12 port gigabit cisco manageable  
> switch.....For which switch we shld go for ?
>
> Pls suggest...
>
>
> Regards,
> Sagar.
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--
Matthew S. Crocker
Vice President
Crocker Communications, Inc.
Internet Division
PO BOX 710
Greenfield, MA 01302-0710
http://www.crocker.com