AT-8948 Switch for Service Providers Architecture and Switching. Introduction. This presentation covers the following topics: Switch architecture Power supplies Front-to-back cooling Switching tables and traffic flow Switching features CompactFlash. Switch Architecture.
AT-8948 Switch for Service ProvidersArchitecture and Switching
This presentation covers the following topics:
Front to back cooling
Console port RJ45
Compact Flash slot
4 x GbE SFP ports
48 x 10/100Base-T RJ45
Marvel Prestera EX115 (37.6Gbps 13Mpps)
CPU – 400Mhz
DRAM – 128MB(up to 256 or 512MB)
IPv6 Accelerator Interface (10Gbps)
32MB Packet Buffer Memory
Dual Hot Swappable PSUs
Power supply design characteristics include:
There are three devices that may be fitted into the PSU bays:
It’s important that both PSU bays are occupied to assist with internal cooling. If only one PSU is fitted, a FOM must be fitted in the other bay.
One PSU is adequate to supply the switch’s power.
Release 2.6.2 includes the command:
Yes, PSUs are hot-swappable
Example output from SHOW SYSTEMcommand with PSU information highlighted
Customer B Site 3
Create the nested VLAN, specifying the customer-ID
Two types of ports are defined:
To operate with other vendors’ equipment, it may be necessary to change the ‘Ethertype’ value in the customer-ID tag from its default value of 0x8100:
A Private VLAN is a VLAN which contains a specified group of ports that are prevented from communicating with each other at Layer 2.
(Also known as a protected or port-protected VLAN)
One customer is not able to snoop on the traffic from any other, yet each customer is able to access another network (usually the Internet).
If the uplink ‘port’ is a trunk group, the trunk group must be created before the ports are added to the private VLAN
Catalyst 3550/3750 Metro
Catalyst 3750 Metro
“The bandwidth limiting capabilities of the 8948 are frightening!” – Senior Test Engineer, 8948 Development Team, ATR.
Catalyst 3750 Metro
Traffic Class Bandwidth
Immediate Discard on Ingress
Bandwidth Class 3
Excess Burst Size (EBS)
Excess Information Rate (EIR)
Bandwidth Class 2
Committed Burst Size (CBS)
Committed Information Rate (CIR)
Bandwidth Class 1
Re-marking options :
VLAN Tag User Priority