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

[xlr8]

Bonjour Christian,

It's not sure that there is a linear relation between number of sessions and
cpu load. I mean increasing the number of ppp session to 2000 should
not load cpu to 100% but to around 40%

We experienced about 33% cpu for 1600 users when we were in similar
configuration. What did most load our cpu was routing and queue when
the link was congested or when there is a lot of "signalling" traffic
(connexion/disconnexion of users)

Le mercredi 19 octobre 2005 à 05:20:23, vous écriviez :

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

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

CS> Running IP-Plus 12.3(16).

CS> Do I have a CPU killer in my config?

CS> Christian


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

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







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-- 
Cordialement,
 xlr8                            mailto:cisco-bba at mls.nc