Update (March 2018)
This document was written at the time when 5.3.4 was about to be released. Hence the SW recommendation for BNG deployment has changed. Please refer to https://supportforums.cisco.com/t5/service-providers-documents/ios-xr-release-strategy-and-deployment-recommendation/ta-p/3165422.
The supported BNG scale specified in this document stands for all 32-bit (aka Classic) IOS XR releases, regardless of the line card generation (Typhoon, Tomahawk) or RSP generation (RSP440-SE, RSP880-SE) because the limit is imposed by the max memory that a process can address. Higher BNG scale requires the 64-bit (aka Enhanced) IOS XR, which also implies Tomahawk and RSP880-SE.
Introduction
The purpose of this document is to share the information about the BNG scale tested within the System Integration Testing (SIT) cycle of IOS XR releases 5.2.4 to 5.3.4 on Cisco ASR9000 platform. This is not the only profile in which BNG was tested at Cisco.
The scalability maximums for individual features may be higher than what is specified in this profile. The BNG SIT profile is provides for a multi-dimensional view of how features perform and scale together. The results in this document closely tie with the setup utilised for this profile. The results may vary depending upon the deployment and optimizations tuned for the convergence.
IOS XR release 5.2.4 is the suggested release for deploying BNG on the ASR9000 platform (until the XR release 5.3.3 is available).
IOS XR release 5.3.4 was posted on October 7th 2016. The XR release 5.3.4 is the Cisco suggested release for all BNG deployments. If your deployment requires features not supported yet in 5.3.4, please reach out to your account team for recommendation. The scale numbers for 5.3.4 are identical to those from 5.2.4. The difference between these releases is in the supported features and level of BNG hardening cycles that we at Cisco have completed.
Note: starting with XR release 5.3.4 you can use RSP880 in BNG deployments on asr9k. The scale remains the same because the scale is dictated by line card capabilities. The supported BNG scale will increase with the introduction of BNG support on Tomahawk generation line cards.
Feature And Scale Under Test
BNG With MSE (RP based subscribers)
| Scale parameter | Scale |
|---|---|
| Access ports | bundle GigE/TenGigE |
| Number of members in a bundle | 2 |
| uplink ports | TenGige |
| Scale - PPP session PTA | 64k (Without any Other BNG Sessions) |
| Scale - PPP Sessions L2TP | 64k (Without any Other BNG Sessions) |
| Scale - IPv4 Sessions | 64k (Without any Other BNG Sessions) |
| Scale - PPP v6 session | 64k (Without any Other BNG Sessions) |
| Scale - IP v6 Session | 64k (Without any Other BNG Sessions) |
| Scale - Dual-Stack Session | 32k (Without any Other BNG Sessions) |
| Sessions Per Port | 8k/32k |
| Sessions Per NPU | 32k |
| Sessions Per Line Card | 64k |
| Number of classes per QoS policy | 8 |
| Total number of unique QoS policies | 50 |
| Number of sub-interfaces | 2k |
| Number LI taps | 100 |
| Number CPLs | 50 |
| Session QoS | Ingress: Policing Egress: Hierarchical QoS; Model F with 3 queues per session |
| Number IPv4 ACLs | 50 |
| Number ACEs per IPv4 ACL | 100 |
| Number IPv6 ACLs | 50 |
| Number ACEs per IPv6 ACL | 100 |
| Number IGP routes | 10k |
| Number VRFs for subscribers | 100 |
| Number BGP routes | 30k |
| Number VPLS | 3000 |
| Number VPWS | 2000 |
| Number MAC addresses | 2000 |
| Number of sessions with multicast receivers | 8000 |
| AAA Accounting | Start-Stop every 10min Interim |
| Service Accounting | 64k + 2 services |
| BNG over Satellite | 32k |
| CPS rate | 80 calls per second |
| CoA | 40 requests per second |
| DHCP (proxy or server) | 60 requests per second |
BNG Only (RP based subscribers)
| Scale parameter | Scale |
|---|---|
| Access ports | bundle GigE/TenGigE |
| Number of members in a bundle | 2 |
| Scale - PPP session PTA | 128k (Without any Other BNG Sessions) |
| Scale - PPP Sessions L2TP | 64k (Without any Other BNG Sessions) |
| Scale - IPv4 Sessions | 128k (Without any Other BNG Sessions) |
| Scale - PPP v6 session | 64k (Without any Other BNG Sessions) |
| Scale - IP v6 Session | 64k (Without any Other BNG Sessions) |
| DS PPPoE | 64k (Without any Other BNG Sessions) |
| Static Session | 8k (Without any Other BNG Sessions) |
| Routed Subscribers | 32k (Without any Other BNG Sessions) |
| Service Accounting | 64K with 2 Services , 24 with 3 Services |
| Routed Pkt Triggered subscriber IPv4/IPv6 | 64k |
CPU Utilisation (RP based subscribers; 128k IPoEv4)
| HW Type | A9K-RSP-440-SE | MOD80-SE |
|---|---|---|
| Role | RSP | Subscriber facing line card |
| Major features | Total of 128k RP based IPoEv4 or PPPoE subscribers | Data plane |
| CPU steady state | 14% | 10-14% |
| CPU peak | 60-70% | 50-60% |
| Top processes | lpts_pa | prm_server_ty |
| iedged | qos_ma_ea | |
| ppp_ma/dhcpd | prm_ssmh | |
| ifmgr | netio |
CPU Utilisation (RP based subscribers; 64k Dual-Stack)
| HW Type | A9K-RSP-440-SE | MOD80-SE |
|---|---|---|
| Role | RSP | Subscriber facing line card |
| Major features | Total of 64k RP based IPoE or PPPoE subscribers | Data plane |
| CPU steady state | 14% | 10-14% |
| CPU peak | 40-50% | 30-40% |
| Top processes | lpts_pa | prm_server_ty |
| iedged | qos_ma_ea | |
| ppp_ma/dhcpd | prm_ssmh/ipv6_nd | |
| ifmgr/ipv6_nd | netio |
BNG Only (LC based subscribers)
| Scale parameter | Scale |
|---|---|
| Access ports | GigE/TenGigE |
| Uplink ports | GigE/TenGigE |
| Scale - PPP session PTA | 256k (Without any Other BNG Sessions) |
| Scale - IPv4 Sessions | 256k (Without any Other BNG Sessions) |
| Scale - PPP v6 session | 128k (Without any Other BNG Sessions) |
| Scale - IP v6 Session | 128k (Without any Other BNG Sessions) |
| DS PPPoE | 128k (Without any Other BNG Sessions) |
| Static Session | 8k (Without any Other BNG Sessions) |
CPU Utilisation (LC based subscribers; 256k IPv4 Sessions)
| HW Type | A9K-RSP-440-SE | MOD80-SE |
|---|---|---|
| Role | RSP | Subscriber facing line card |
| Major features | LC based IPoE or PPPoE Subscribers (256k) | LC based Subscribers, Control and Data plane (64K per LC) |
| CPU steady state | 10% | 10-14% |
| CPU peak | 10% | 80-90% |
| Top processes | dhcpv6/dhcp | prm_server_ty |
| iedged/ipv4_rib | dhcpv6/dhcp | |
| ppp_ma/dhcpd | iedged | |
| ppp_ma | ||
| qos_ma_ea |
PWHE With BNG Only (RP based subscribers)
| Scale parameter | Scale |
|---|---|
| Generic interafce list members | Bundle, GigE/TenGigE |
| Number of members in a bundle | 2 |
| Scale - PPP session PTA | 128k (Without any Other BNG Sessions) |
| Scale - IPv4 Sessions | 128k (Without any Other BNG Sessions) |
| PW Scale | 1k |
