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Broadband Scalability and Performance
PPP Sessions and L2TP Tunnel Scaling
2
Cisco ASR 1000 Series Aggregation Services Routers Software Configuration Guide
PPP Sessions and L2TP Tunnel Scaling
The ASR 1000 Series Routers are deployed in a variety of broadband deployment models for terminating
Point-to-Point Protocol (PPP) Sessions and initiating or terminating Layer 2 Tunneling Protocol (L2TP)
tunnels. The maximum number of PPP sessions and L2TP tunnels is dependent on the hardware
combination.
Table 18
lists the hardware combinations and the maximum number of PPP sessions and
L2TP tunnels that are supported in Cisco IOS XE Release 3.3. For information about the restrictions for
PPP sessions and L2TP tunnel scaling, see the
“Restrictions for PPP Sessions and L2TP Tunnel Scaling”
section on page 2
.
Table 19
lists the virtual circuit limits for ASR 1000 ATM SPAs, effective from Cisco IOS XE
Release 3.5.
Restrictions for PPP Sessions and L2TP Tunnel Scaling
This section lists the restrictions for the PPP sessions and L2TP tunnel scalability.
•
To achieve maximum scaling for the 1001, 1002, and 1004 chassis, we recommend software
redundancy be disabled for broadband applications, and only hardware redundancy be configured.
•
Restrictions on 48000 session scaling with RP2 and ESP-40G include:
Table 18
Maximum Number of PPP Sessions and L2TP Tunnels Supported on ASR 1000
Hardware
Chassis
RP
ESP
PPP Session
L2TP Tunnel
1001
Integrated
ESP-2.5G or
ESP-5G
8000
4000
1002
Integrated
RP1
ESP-5G
12000
6000
1004, 1006
RP1
ESP-10G or
ESP-20G
24000
12000
1004, 1006
RP2
ESP-20G
32000
16000
1004, 1006, 1013
RP2
ESP-40G
32000
1
, 48000, or 64000
1.
32000 session scaling with RP2 and ESP-40G is fully supported without any additional restrictions. For restrictions on 48000
and 64000 see the
“Restrictions for PPP Sessions and L2TP Tunnel Scaling” section on page 2
.
64000
Table 19
ASR 1000 ATM Virtual Circuit (VC) Limits
ASR1000-SIP10
ASR1000-SIP40
SPA/SIP
Number of VCs
SPA/SIP
Number of VCs
SPA-1XOC12-ATM-V2
4000 VCs per Port,
4000 VCs per SPA
SPA-1XOC12-ATM-V2
4000 VCs per Port,
4000 VCs per SPA
SPA-1XOC3-ATM-V2
4000 VCs per Port,
4000 VCs per SPA
SPA-1XOC3-ATM-V2
4000 VCs per Port,
4000 VCs per SPA
SPA-3XOC3-ATM-V2
3000 VCs per Port,
9000 VCs per SPA
SPA-3XOC3-ATM-V2
4000 VCs per Port,
12000 VCs per SPA
ASR1000-SIP10
24000 VCs per SIP
ASR1000-SIP40
32000 VCs per SIP