Cisco Cisco IOS Software Release 12.2(4)B

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Release Notes for Cisco 6400 Carrier-Class Broadband Aggregator for Cisco IOS Release 12.2(4)B7
OL-2951-03
Important Notes
Note
To support more than 750 sessions, the NRP-1 must have 128 MB DRAM.
Note
In most NRP-2 configurations, 256 MB DRAM is adequate for up to 6500 (PPPoE) sessions. More 
sessions require 512 MB DRAM.
NRP-2SV Scalability Tuning Parameters
Following are scalability tuning parameter values used during testing for 6000 PPPoA sessions and 2000 
L2TP tunnels. These parameters prevent known issue CSCdu86416 from occurring. (8K/2K L2TP 
sessions/tunnels don’t come up even after a long wait.)
interface Virtual-Template1
keepalive 200
ppp timeout retry 25
ppp timeout authentication 20
vpdn-group 1
l2tp tunnel hello 150
l2tp tunnel receive-window 500
l2tp tunnel nosession-timeout 20
l2tp tunnel retransmit retries 12
l2tp tunnel retransmit timeout min 4
l2tp tunnel retransmit timeout max 6
Following is the hold-queue CLI used during testing.
interface ATM0/0/0
 no ip address
 load-interval 30
 atm vc-per-vp 2048
 no atm ilmi-keepalive
 hold-queue 4096 in
 hold-queue 4096 out
end
Table 7
NRP-SSG Session and Tunnel Scalability in Cisco IOS Release 12.2(4)B7
Protocol with NRP-SSG
NRP-1
NRP-2 and NRP-2SV
Supported Sessions
Supported Tunnels
Supported Sessions
Supported Tunnels
L2TP PPPoA
up to 1000
up to 100
up to 4000
up to 2000
L2TP PPPoE
up to 1000
up to 100
up to 4000
up to 2000
PPPoA
up to 2000
up to 8000
PPPoE
up to 2000
up to 8000
RBE
up to 2000
up to 8000
RFC 1483 IP Routed
up to 2000
up to 8000
GRE PPPoA
up to 1800
up to 75
up to 8000
up to 1700