[c-nsp] PPPOE Dropouts
Paul Stewart
paul at paulstewart.org
Fri Sep 14 18:06:03 EDT 2007
Hmm.. Yes, this would be one common factor for sure.... Strange that we have
hundreds of Comtrends in production though - possibly a firmware issue
though...
c7200-ik9o3s-mz.124-13b.bin here.... I think we may swap a few of these
client modems and see if there's some common ground. So far I haven't heard
anything back from the list suggesting this is a Cisco IOS/router issue...
Thanks,
Paul
-----Original Message-----
From: Frank Bulk [mailto:frnkblk at iname.com]
Sent: Friday, September 14, 2007 5:10 PM
To: 'Paul Stewart'; cisco-nsp at puck.nether.net
Subject: RE: [c-nsp] PPPOE Dropouts
Paul:
Same thing here: clean lines, just some customers.
We're generally using Comtrend 5621 or 536+, but we have a lot of Draytek in
the field, too.
We using c7200-is-mz.122-26.bin, what's yours?
Since only one customer has called and complained, and that appeared to be
fixed by putting in a Westell (after much urging from the customer), I've
just put it aside, hoping that the next time we do a software upgrade it
fixes itself.
To put the Westell 'fix' in context, here's some counts of their login (from
radius log).
8 Apr 1
9 Apr 2
13 Apr 3
9 Apr 4
7 Apr 5
12 Apr 6
13 Apr 7
12 Apr 8
12 Apr 9
16 Apr 10
10 Apr 11
13 Apr 12
8 Apr 13
11 Apr 14
13 Apr 15
12 Apr 16
13 Apr 17
11 Apr 18
5 Apr 19
1 Apr 24
1 May 21
1 May 22
1 Jun 30
3 Aug 5
My only guess is that the DSL modem (because normally we deploy PPPoA, only
configuring the DSL modem as a bridge and PPPoE on CPE when customer needs
it for their own equipment) is somehow breaking the session.
Frank
-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Paul Stewart
Sent: Friday, September 14, 2007 9:55 AM
To: cisco-nsp at puck.nether.net
Subject: [c-nsp] PPPOE Dropouts
Hi folks...
This is a long shot but we have some clients who are connected via PPPOE on
ADSL2+ who are randomly dropping off once in a while. On the same
ADSL2+ system,
we have a number of clients who are online for weeks with no issues. Same
equipment, identical modems at CPE etc.... they are all Comtrend CT-5071
modems connected back to our Occam DSLAM....
The router config there (7206VXR) is identical to other locations (dozens of
other locations).... so I can't see where this could be a Cisco related
issue but reaching for ideas... the general feedback is that most of them
stay online for 10-15 minutes and then their PPPOE session drops. Their
line sync on the physical side looks VERY clean and no loss of line sync or
retrains...
Radius reports:
Wed Aug 1 10:03:22 2007
Acct-Session-Id = "0/0/3/15_0000DE0E"
Cisco-AVPair = "client-mac-address=000f.ea0d.8616"
Framed-Protocol = PPP
Framed-IP-Address = xxx.xxx.xxx.xxx
User-Name = "xxxxxxxxx"
Cisco-AVPair = "connect-progress=LAN Ses Up"
Acct-Authentic = RADIUS
Acct-Status-Type = Start
NAS-Port-Type = 15
NAS-Port-Id = 50331663
Attr-87 = "0/0/3/15"
Service-Type = Framed-User
NAS-IP-Address = xxx.xxx.xxx.xxx
Attr-55 = "F\260\221\252"
NAS-Identifier = "xxxxxxxx.nexicom.net"
Acct-Delay-Time = 0
Client-IP-Address = xxx.xxx.xxx.xxx
Realm = "nexicom.net"
Timestamp = 1185977002
Request-Authenticator = Verified
Wed Aug 1 10:16:42 2007
Acct-Session-Id = "0/0/3/15_0000DE0E"
Cisco-AVPair = "client-mac-address=000f.ea0d.8616"
Framed-Protocol = PPP
Framed-IP-Address = xxx.xxx.xxx.xxx
User-Name = "xxxxxxxxx"
Acct-Authentic = RADIUS
Cisco-AVPair = "connect-progress=LAN Ses Up"
Cisco-AVPair = "nas-tx-speed=1000000000"
Cisco-AVPair = "nas-rx-speed=1000000000"
Acct-Session-Time = 800
Acct-Input-Octets = 236769
Acct-Output-Octets = 1707019
Acct-Input-Packets = 1342
Acct-Output-Packets = 1699
Acct-Terminate-Cause = Port-Error
Cisco-AVPair = "disc-cause-ext=TCP Foreign Host Close"
Acct-Status-Type = Stop
NAS-Port-Type = 15
NAS-Port-Id = 50331663
Attr-87 = "0/0/3/15"
Service-Type = Framed-User
NAS-IP-Address = xxx.xxx.xxx.xxx
Attr-55 = "F\260\224\312"
NAS-Identifier = "xxxxxxxxxx.nexicom.net"
Acct-Delay-Time = 0
Client-IP-Address = xxx.xxx.xxx.xxx
Realm = "nexicom.net"
Timestamp = 1185977802
Request-Authenticator = Verified
Cisco config looks like this:
aaa group server radius Nexicom
server-private xxx.xxx.xxx.xxx auth-port 1812 acct-port 1813 key 7
XXXXXXXXXXXXX server-private xxx.xxx.xxx.xxx auth-port 1645 acct-port 0 key
7 XXXXXXXXXXXXXXXX ip radius source-interface Loopback0
virtual-profile if-needed
!
vpdn enable
vpdn multihop
vpdn authen-before-forward
bba-group pppoe global
virtual-template 1
interface GigabitEthernet0/3.15
description Occum ADSL
encapsulation dot1Q 15
ip nbar protocol-discovery
pppoe enable group global
pppoe max-sessions 1000
interface Virtual-Template1
ip unnumbered Loopback0
ip mtu 1492
no logging event link-status
no snmp trap link-status
peer default ip address pool default
ppp authentication pap Nexicom
ppp authorization Nexicom
ppp accounting Nexicom
ppp ipcp dns 216.168.96.10 216.168.96.13 no clns route-cache
radius-server attribute 44 include-in-access-req radius-server attribute 32
include-in-access-req radius-server attribute 32 include-in-accounting-req
radius-server attribute 55 include-in-acct-req radius-server attribute
nas-port format d radius-server vsa send accounting radius-server vsa send
authentication
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