Cisco Cisco Tunnel Terminating Gateway (TTG) Fehlerbehebungsanleitung
L2TP Access Concentrator
▀ L2TP Session and Tunnel Capacities
▄ Cisco ASR 5000 Series Enhanced Feature Configuration Guide
OL-22982-01
L2TP Session and Tunnel Capacities
The system is capable of supporting L2TP tunnels for all subscriber sessions or on a session-by-session basis.
Each L2TP tunnel can facilitate one or more subscriber sessions. The number of supported L2TP sessions and tunnels
corresponds to the number of active Packet Accelerator Cards (PACs) or Packet Services Cards (PSCs)
corresponds to the number of active Packet Accelerator Cards (PACs) or Packet Services Cards (PSCs)
The following tables lists PDSN Simple IP tunnel and session capacities for the ST16 and ASR 5000 respectively.
Important:
The capacities stated in this section are the maximum supported by the components. Actual capacities
are dependent upon hardware and software configurations.
Table 21. L2TP LAC Tunnel and Session Capacity per ST16 for PDSN Simple IP
Capacity/PAC
Capacity/Full System1
Minimum # of LAC services Required2
Tunnels
32,000
32,000
1
Sessions
40,000
500,000
1
Transactions/Second
4003
40004
N/A
1. A full system consists of 13 active PACs.
2. Multiple LAC services can be configured to reduce the amount of traffic over a single interface.
3. Transactions include PPP and LAC
4. Transactions include PPP and LAC session setup assuming that a tunnel already exists.
Table 22. L2TP LAC Tunnel and Session Capacity per ASR 5000 for PDSN Simple IP
Capacity/PSC
Capacity/Full System1
Minimum # of LAC services Required2
Tunnels
32,000
32,000
1
Sessions
120,000
1,500,000
1
Transactions/Second
8003
10,0004
N/A
1. A full system consists of 13 active PSCs.
2. Multiple LAC services can be configured to reduce the amount of traffic over a single interface.
3. Transactions include PPP and LAC
4. Transactions include PPP and LAC session setup assuming that a tunnel already exists.
The following table lists HA tunnel and session capacities for the ST16 and ASR 5000 respectively.