[cisco-bba] LNS with 7200 with NPE-G1

[Christian Schmit]

We are currently running a test setup using a 7200/G1
device as LNS. The telco operates as LAC Juniper ERX
devices.

Everything is working as expected but the CPU load
on the G1 is quite high. Having around 200 PPP sessions
on the LNS the CPU load is already at 11%. In other
words this would mean that around 2000 users would put
the box to 100% CPU usage which is very far away from
the advertised 16 000 broadband sessions for the G1.

Running IP-Plus 12.3(16).

Do I have a CPU killer in my config?

Christian


My config:
-----------
version 12.3
service timestamps debug datetime msec
service timestamps log datetime msec
service password-encryption
no service dhcp
!
hostname LNS
!
boot-start-marker
boot-end-marker
!
enable password xxxxxxxxxxxxxxxxxxxxxxxxxx
!
clock timezone GMT 1
clock summer-time MET recurring last Sun Mar 3:00 last Sun Oct 3:00
aaa new-model
!
!
aaa authentication login default enable
aaa authentication ppp default group radius
aaa authorization network default group radius
aaa accounting delay-start
aaa accounting update periodic 240
aaa accounting network default start-stop group radius
aaa session-id common
ip subnet-zero
no ip source-route
!
!
ip cef
no ip domain lookup
ip name-server xxxxxxxxxxxx
ip name-server xxxxxxxxxxxx
!
vpdn enable
vpdn ip udp ignore checksum
!
vpdn-group 1
 accept-dialin
  protocol l2tp
  virtual-template 1
 terminate-from hostname LAC
 lcp renegotiation on-mismatch
 l2tp tunnel password 7 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
!
interface Loopback0
 ip address xxxxxxxxxxxxxxxxxxxxx
!
interface Loopback1
 ip address xxxxxxxxxxxxxxxxxxxxx
!
interface GigabitEthernet0/1
 description Connection to Vlan 13
 ip address xxxxxxxxxxxxxxxxxxxx
 ip ospf message-digest-key 10 md5 7 xxxxxxxxxxxxxxxxxx
 duplex full
 speed 1000
 media-type rj45
 no negotiation auto
!
interface GigabitEthernet0/2
 no ip address
 shutdown
 duplex auto
 speed auto
 media-type rj45
 negotiation auto
!
interface GigabitEthernet0/3
 no ip address
 shutdown
 duplex auto
 speed auto
 media-type rj45
 negotiation auto
!
interface Virtual-Template1
 ip unnumbered Loopback1
 ip tcp adjust-mss 1420
 ip mroute-cache
 peer default ip address pool VODSL
 ppp mtu adaptive
 ppp authentication pap chap
!
router ospf 101
 log-adjacency-changes
 area 0 authentication message-digest
 summary-address xxxxxxxxxxxxxxxxxxxx
 summary-address xxxxxxxxxxxxxxxxxxxxx
 redistribute connected subnets
 redistribute static subnets
 passive-interface Virtual-Template1
 network xxxxxxxxxxxxxxxxxxx area 0
 network xxxxxxxxxxxxxxxxxxx area 0
!
ip local pool VODSL xxxxxxxxxxxxxxxxxxxx
ip local pool VODSL xxxxxxxxxxxxxxxxxxxx
ip classless
ip route 0.0.0.0 0.0.0.0 xxxxxxxxxxxxxxxxx
ip route xxxxxxxxxxxxxxxxxxxxxxxxx Loopback0 10
ip route xxxxxxxxxxxxxxxxxxxxxxxxx Loopback0 10
ip route xxxxxxxxxxxxxxxxxxxxxxxxx Loopback0 10
no ip http server
!
!
access-list 1 permit xxxxxxxxxxxxxxxxx
access-list 1 deny   any
access-list 50 permit xxxxxxxxxxxxxxxx
access-list 50 deny   any
no cdp run
!
snmp-server community xxxxxxxxxxxxxxxxx RW 1
!
radius-server attribute nas-port format d
radius-server host xxxxxxxxxx auth-port 1645 acct-port 1646 key 7 xxxxx

radius-server domain-stripping
radius-server unique-ident 3
radius-server vsa send accounting
!
!
gatekeeper
 shutdown
!
line con 0
 stopbits 1
line aux 0
 stopbits 1
line vty 0 4
 access-class 50 in
!
ntp clock-period 17180061
ntp server xxxxxxxxxxxx
ntp server xxxxxxxxxxxx
!
end