We are a telco and ISP offering DSL service to our customers, and currently have an OC-3 link from our Cisco 7200 to our ATM switch that aggregates the traffic. We currently have a vpdn group set up to accept the incoming connections, but I have some concerns about limitations and am looking for some advice (router info at the bottom). I thank you in advance for any help you can provide.
1. Is there a limit to the number of Virtual Access Interfaces that can be created on the 7200? When I do a 'clear vi ?', it shows the session number from 1-101, so I am very concerned. If it can support more than 101, do I need to create new vpdn groups? If not, is there another way I can terminate the sessions (i.e. not Virtual Access)?
2. Is there a limit to the number of pvcs that can have simultaneous connections on the 7200? I know the theoretical number is around 4000, but is there a more practical number when you begin seeing performance degradation?
---------------------Router Info ------------------------------
Cisco Internetwork Operating System Software
IOS (tm) 7200 Software (C7200-IS-M), Version 12.2(2)T, RELEASE SOFTWARE (fc1)
Copyright (c) 1986-2001 by cisco Systems, Inc.
Compiled Sun 03-Jun-01 03:55 by ccai
Image text-base: 0x600089C0, data-base: 0x61458000
ROM: System Bootstrap, Version 12.0(19990210:195103) [12.0XE 105], DEVELOPMENT SOFTWARE
BOOTFLASH: 7200 Software (C7200-BOOT-M), Version 12.0(10)S, EARLY DEPLOYMENT RELEASE SOFTWARE (fc1)
cisco 7206VXR (NPE300) processor (revision D) with 253952K/40960K bytes of memory.
Processor board ID 21300636
R7000 CPU at 262Mhz, Implementation 39, Rev 2.1, 256KB L2, 2048KB L3 Cache
6 slot VXR midplane, Version 2.1
Last reset from power-on
Bridging software.
X.25 software, Version 3.0.0.
1 FastEthernet/IEEE 802.3 interface(s)
2 Serial network interface(s)
1 ATM network interface(s)
125K bytes of non-volatile configuration memory.
20480K bytes of Flash PCMCIA card at slot 0 (Sector size 128K).
16384K bytes of Flash PCMCIA card at slot 1 (Sector size 128K).
4096K bytes of Flash internal SIMM (Sector size 256K).
Configuration register is 0x102
------------------Config Info (pertaining to this question)--------------------
boot system slot1:c7200-is-mz.122-2.T.bin
aaa new-model
aaa authentication login default line group radius
aaa authentication login conmethod enable
aaa authentication ppp default if-needed group radius local
aaa authorization network default group radius
aaa accounting exec default wait-start group radius
aaa accounting network default wait-start group radius
!
no ip dhcp-client network-discovery
async-bootp subnet-mask 255.255.255.0
async-bootp dns-server 63.82.131.9 63.89.72.9
vpdn enable
vpdn session-limit 10000
!
vpdn-group 1
accept-dialin
protocol pppoe
virtual-template 1
!
call rsvp-sync
!
interface ATM1/0
ip address 10.0.0.1 255.255.255.0
no atm ilmi-keepalive
pvc 13/55
encapsulation aal5snap
protocol pppoe
!
pvc 13/56
encapsulation aal5snap
protocol pppoe
.... etc (ps. I know now how to do the range of pvcs, but haven't gone and reconfigured)
