Resolving Oversubscription; Ingress Classification Overview - Cisco ASR 1000 Configuration Manual
Aggregation services routers sip and spa software
Hide thumbs
Also See for ASR 1000:
- Software configuration manual (602 pages) ,
- Configuration manual (126 pages) ,
- Replacing (120 pages)
Table of Contents
Advertisement
Chapter 27
Classifying and Scheduling Packets for ASR 1000 Series
Table 27-4
ASR 1000 Chassis Type ESP Type
•
•
•
Conclusion: SIP40G
oversubscription
depends on the ESP
type.
Resolving Oversubscription
Following are the two high-level tasks which need to performed to resolve the bandwidth
oversubscription on the ingress side:
•
•
Ingress Classification Overview
To solve the bandwidth oversubscription issue, packets must be classified as high-priority data traffic
and control traffic, and guarantee their trasmit to the QFP. Ingress Classification can be broadly divided
into two:
•
OL-14127-08
SIP-40 Oversubscription Details
ASR1000-SIP40G
ESP-2.5 G and
ESP-5 G
Incoming rate
(Supported only
from SPAs.
on ASR-1002)
Maximum 4
ESP-10G
multiplied by 11.2
Gbps
Outgoing rate
towards ESP
depends on the
ESP type
ESP-20G
ESP-40G
Classifying the incoming traffic as high priority and low priority. Depending on the SPA type, the
classification is done by either a SIP or a SPA.
Scheduling the high-priority packets first and then processing the low-priority traffic. Depending on
the scheduling configuration, weight can be assigned to low-priority packets.
SPA-based classification—Some of the SPAs support the classification performed within the SPA
hardware.
Cisco ASR 1000 Series Aggregation Services Routers SIP and SPA Software Configuration Guide
Information About Ingress Classification
Oversubscription State
Not supported.
ASR1000-SIP40G operates as ASR1000-SIP10G.
Example:
Input rate from (example) 3 carrier cards is 3 multiplied
by 11.2 Gbps
Output rate towards QFP=12.8 Gbps
ESP is oversubscribed.
ASR1000-SIP40G operates as ASR1000-SIP10G.
Example:
Input rate from (example) 3 carrier cards is 3 multiplied
by 11.2 Gbps
Output rate towards QFP=25.6 Gbps
ESP is oversubscribed.
ASR1000-SIP40G operates as ASR1000-SIP40G.
Example:
Input rate from (example) 3 carrier cards is 3 multiplied
by 23 Gbps
Output rate towards QFP=51.2 Gbps
ESP is oversubscribed.
27-5
- Quick Links:
- Configuring a Subinterface on a Vlan
Hide quick links:
Advertisement
Table of Contents
Troubleshooting
