Broadband Scalability and Performance
Layer 4 Redirect Scaling
4
Cisco ASR 1000 Series Aggregation Services Routers Software Configuration Guide
Note
RP1 with 2GB DRAM is not recommended for IP sessions deployment.
Layer 4 Redirect Scaling
The ASR 1000 supports the ability to redirect IP traffic within an ISG traffic class. Layer 4 redirect
scaling is performed by the Quantum Flow Processor (QFP). The scaling limits are dependent on the
ESP.
Table 21
lists the ESP and the default per-session limit.
Configuring the Cisco ASR 1000 Series Router for High
Scalability
The Cisco ASR 1000 Series Routers provide powerful performance and scalability for embedded
services.
To achieve maximum scaling on the 1001, 1002, and 1004 chassis, IOS software redundancy must be
disabled. For more information about restrictions and limitations, see the
“Restrictions for PPP Sessions
and L2TP Tunnel Scaling” section on page 2
.
To ensure high scalability on the Cisco ASR 1000 Series Router, perform the following configuration
tasks:
•
Configuring Call Admission Control, page 5
•
Control Plane Policing, page 5
•
VPDN Group Session Limiting, page 6
•
PPPoE Session Limiting, page 6
1004, 1006
RP1
ESP-10G or ESP-20G
24000
72000
1004, 1006, 1013
RP2
ESP-20G or ESP-40G
32000
96000
Table 20
Maximum Number of IP Sessions Supported on ASR 1000 Hardware (continued)
Chassis
RP
ESP
IP Session
ISG Traffic Class
Table 21
Maximum Number of Per-Session Limit Per ESP
ESP
L4 Redirect Translations
Default Per-Session Limit
ESP-2.5G
256K
128
ESP-5G
256K
128
ESP-10G
512K
128
ESP-20G
1 Million
128
ESP-40G
1 Million
128
