Cisco Cisco IOS Software Release 12.2(4)B

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