[c-nsp] PPPOE intermittently fails to respond to PPP keepalives on 7204xvr with 12.4(24)T5
Richard Haakma
richard at kci.net.nz
Wed Aug 21 21:45:03 EDT 2013
On Wed, 2013-08-21 at 19:45 -0400, Robert Blayzor wrote:
> On Aug 21, 2013, at 1:49 PM, Richard Haakma <richard at kci.net.nz> wrote:
> > The problem is that intermittently IOS on the 7204VXR will not respond
> > to PPP keepalive packets. Some CPEs send keepalives and when they don't
> > get a reply they disconnect the PPP session and reconnect. Some
> > customers notice the short outage and it can be repeated several times
> > over a few minutes. This has been verified by observing packets at the
> > CPE.
>
>
> I don't believe this is right. The BRAS should be sending the keepalives and the client should be answering. At least your virtual-template should have a default keepalive of 10 seconds.
>
> You can try increasing this keepalive to 20-30 seconds and see if things improve; but unlikely. The big problem with increasing the keepalive value is the time it takes the router to detect dead PPP sessions and frees the session and any IP pool address associated with it.
>
As I said in my original posting, I have packet traces which show the
CPE sending keepalive packets, not receiving a reply then initiating
PPPoE shutdown.
The BRAS does send keepalives as you say and these are being replied. It
is the CPE which is not getting replies to its keepalive packets.
Another person asked for CPU usage:
Currently
CPU utilization for five seconds: 20%/13%; one minute: 23%; five
minutes: 23%
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY
Process
1 4 133 30 0.00% 0.00% 0.00% 0 Chunk
Manager
2 4056 983953 4 0.00% 0.01% 0.00% 0 Load
Meter
3 39768 43814517 0 0.07% 0.07% 0.07% 0 IPHC
Admin
4 0 1 0 0.00% 0.00% 0.00% 0
EDDRI_MAIN
5 7848092 655421 11974 0.00% 0.11% 0.11% 0 Check
heaps
6 1924 11979 160 0.00% 0.00% 0.00% 0 Pool
Manager
7 0 2 0 0.00% 0.00% 0.00% 0
Timers
8 0 2 0 0.00% 0.00% 0.00% 0 ATM
AutoVC Perio
9 0 2 0 0.00% 0.00% 0.00% 0 ATM VC
Auto Crea
10 12 81996 0 0.00% 0.00% 0.00% 0 IPC
Dynamic Cach
11 0 1 0 0.00% 0.00% 0.00% 0 IPC
Zone Manager
12 612 4803078 0 0.00% 0.00% 0.00% 0 IPC
Periodic Tim
13 536 4803078 0 0.00% 0.00% 0.00% 0 IPC
Deferred Por
14 0 1 0 0.00% 0.00% 0.00% 0 IPC
Seat Manager
15 0 1 0 0.00% 0.00% 0.00% 0 IPC
BackPressure
16 2737608 4918171 556 0.00% 0.00% 0.02% 0
EnvMon
17 0 1 0 0.00% 0.00% 0.00% 0 OIR
Handler
18 0 1 0 0.00% 0.00% 0.00% 0 Crash
writer
19 202716 1495851 135 0.00% 0.00% 0.00% 0 ARP
Input
20 1420 5129528 0 0.00% 0.00% 0.00% 0 ARP
Background
21 0 2 0 0.00% 0.00% 0.00% 0 ATM
Idle Timer
22 4880 163991 29 0.00% 0.00% 0.00% 0 AAA
high-capacit
23 0 216 0 0.00% 0.00% 0.00% 0
AAA_SERVER_DEADT
24 0 1 0 0.00% 0.00% 0.00% 0 Policy
Manager
25 3752 132656 28 0.00% 0.00% 0.00% 0 DDR
Timers
26 0 4 0 0.00% 0.00% 0.00% 0 Entity
MIB API
27 976 519664 1 0.00% 0.00% 0.00% 0 EEM ED
Syslog
28 0 2 0 0.00% 0.00% 0.00% 0 Serial
Backgroun
29 0 1 0 0.00% 0.00% 0.00% 0 RO
Notify Timers
30 0 1 0 0.00% 0.00% 0.00% 0 RMI RM
Notify Wa
31 0 2 0 0.00% 0.00% 0.00% 0
SMART
32 1020 4919760 0 0.00% 0.00% 0.00% 0
GraphIt
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
33 0 2 0 0.00% 0.00% 0.00% 0 Dialer
event
34 0 1 0 0.00% 0.00% 0.00% 0 SERIAL
A'detect
35 0 2 0 0.00% 0.00% 0.00% 0 XML
Proxy Client
36 0 1 0 0.00% 0.00% 0.00% 0
Critical Bkgnd
37 6091260 1747247 3486 0.07% 0.12% 0.13% 0 Net
Background
38 0 2 0 0.00% 0.00% 0.00% 0 IDB
Work
39 7876 556045 14 0.00% 0.00% 0.00% 0
Logger
40 8748 4916306 1 0.00% 0.00% 0.00% 0 TTY
Background
41 59118276 4943475 11958 1.19% 1.23% 1.22% 0
Per-Second Jobs
42 47000 264708 177 0.00% 0.00% 0.00% 0 IF-MGR
control p
43 168 260769 0 0.00% 0.00% 0.00% 0 IF-MGR
event pro
44 0 1 0 0.00% 0.00% 0.00% 0 Inode
Table Dest
45 40 84818 0 0.00% 0.00% 0.00% 0
Transport Port A
46 2855864 1042278 2740 0.00% 0.07% 0.05% 0 HC
Counter Timer
47 0 1 0 0.00% 0.00% 0.00% 0 Coproc
Event Pro
48 0 1 0 0.00% 0.00% 0.00% 0 POS APS
Event Pr
49 0 1 0 0.00% 0.00% 0.00% 0 SONET
alarm time
50 0 1 0 0.00% 0.00% 0.00% 0 CSP
Timer
51 0 1 0 0.00% 0.00% 0.00% 0 FPD
Management P
52 0 1 0 0.00% 0.00% 0.00% 0 FPD
Action Proce
53 4 2 2000 0.00% 0.00% 0.00% 0 VNM
DSPRM MAIN
54 0 2 0 0.00% 0.00% 0.00% 0 Flash
MIB Update
55 0 13 0 0.00% 0.00% 0.00% 0 Flash
Card Oir
56 0 1 0 0.00% 0.00% 0.00% 0 CES
Line Conditi
57 0 1 0 0.00% 0.00% 0.00% 0 Async
write proc
58 0 2 0 0.00% 0.00% 0.00% 0
Ethernet CFM
59 620 4803144 0 0.00% 0.00% 0.00% 0
Ethernet Timer C
60 0 1 0 0.00% 0.00% 0.00% 0 delayed
evt hand
61 0 2 0 0.00% 0.00% 0.00% 0 AAA
Dictionary R
62 108220 569879 189 0.00% 0.00% 0.00% 0 AAA
Server
63 150940 3701819 40 0.07% 0.02% 0.00% 0 AAA
ACCT Proc
64 17300 3306187 5 0.07% 0.02% 0.00% 0 ACCT
Periodic Pr
66 0 2 0 0.00% 0.00% 0.00% 0
Ethernet OAM Pro
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
67 0 2 0 0.00% 0.00% 0.00% 0 CEF
switching ba
68 60 364 164 0.00% 0.00% 0.00% 0 ADJ
resolve proc
69 0 11 0 0.00% 0.00% 0.00% 0 IP ARP
Adjacency
70 0 1 0 0.00% 0.00% 0.00% 0 IP ARP
Retry Age
71 160021764 2258838943 0 4.31% 4.62% 5.03% 0 IP
Input
72 0 1 0 0.00% 0.00% 0.00% 0 ICMP
event handl
73 0 4 0 0.00% 0.00% 0.00% 0
TurboACL
74 0 2 0 0.00% 0.00% 0.00% 0
TurboACL chunk
75 0 1 0 0.00% 0.00% 0.00% 0 IPv6
Echo event
76 0 1 0 0.00% 0.00% 0.00% 0 LSP
Tunnel FRR
77 0 1 0 0.00% 0.00% 0.00% 0 MPLS
Auto-Tunnel
78 16 8201 1 0.00% 0.00% 0.00% 0 MOP
Protocols
79 120452 843381 142 0.00% 0.00% 0.00% 0 PPP
Hooks
80 24 123 195 0.00% 0.00% 0.00% 2 Virtual
Exec
81 480928 2002178 240 0.00% 0.00% 0.00% 0 SSS
Manager
82 0 1 0 0.00% 0.00% 0.00% 0 SSS
Feature Mana
83 0 1 0 0.00% 0.00% 0.00% 0 SSS
Feature Time
84 0 2 0 0.00% 0.00% 0.00% 0
Spanning Tree
85 0 1 0 0.00% 0.00% 0.00% 0 X.25
Encaps Mana
86 3712 267421 13 0.00% 0.00% 0.00% 0 SSM
connection m
87 0 1 0 0.00% 0.00% 0.00% 0 AC
Switch
88 46720 1067499 43 0.00% 0.00% 0.00% 0 IP
Background
89 132140 372777 354 0.00% 0.00% 0.00% 0 IP RIB
Update
90 116 99086 1 0.00% 0.00% 0.00% 0 CEF
background p
91 188400 7362731 25 0.23% 0.19% 0.18% 0 CEF:
IPv4 proces
92 3088 137857 22 0.00% 0.00% 0.00% 0 ADJ
background
93 278300 264660 1051 0.00% 0.00% 0.00% 0 PPP IP
Route
94 41248 449555 91 0.00% 0.00% 0.00% 0 PPP
IPCP
95 0 1 0 0.00% 0.00% 0.00% 0 IP
Traceroute
96 816 69733 11 0.00% 0.00% 0.00% 0 TCP
Timer
97 5168 85935 60 0.00% 0.00% 0.00% 0 TCP
Protocols
98 0 1 0 0.00% 0.00% 0.00% 0 Socket
Timers
99 8 16400 0 0.00% 0.00% 0.00% 0 HTTP
CORE
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
100 0 2 0 0.00% 0.00% 0.00% 0 RLM
groups Proce
101 0 1 0 0.00% 0.00% 0.00% 0 L2X
Data Daemon
102 0 2 0 0.00% 0.00% 0.00% 0 Border
Element p
103 0 3 0 0.00% 0.00% 0.00% 0 gk
process
104 0 1 0 0.00% 0.00% 0.00% 0
ac_atm_state_eve
105 0 2 0 0.00% 0.00% 0.00% 0 SNMP
Timers
106 7620 4916409 1 0.00% 0.00% 0.00% 0 RUDPV1
Main Proc
107 0 1 0 0.00% 0.00% 0.00% 0
bsm_timers
108 2788 4916361 0 0.00% 0.00% 0.00% 0
bsm_xmt_proc
109 0 1 0 0.00% 0.00% 0.00% 0
COPS
110 0 2 0 0.00% 0.00% 0.00% 0 Dialer
Forwarder
111 0 3 0 0.00% 0.00% 0.00% 0 Flow
Exporter Ti
112 0 2 0 0.00% 0.00% 0.00% 0 ATM OAM
Input
113 0 2 0 0.00% 0.00% 0.00% 0 ATM OAM
TIMER
114 0 1 0 0.00% 0.00% 0.00% 0 RARP
Input
115 0 1 0 0.00% 0.00% 0.00% 0 LAPB
Process
116 0 1 0 0.00% 0.00% 0.00% 0 IPv6
Inspect Tim
117 0 2 0 0.00% 0.00% 0.00% 0 LFDp
Input Proc
118 0 1 0 0.00% 0.00% 0.00% 0 PAD
InCall
119 0 2 0 0.00% 0.00% 0.00% 0 X.25
Background
120 114548 718757 159 0.00% 0.00% 0.00% 0 PPP
Bind
121 53524 289692 184 0.00% 0.00% 0.00% 0 PPP
SSS
122 0 1 0 0.00% 0.00% 0.00% 0 MQC
Flow Event B
123 83512 1205194960 0 0.23% 0.23% 0.23% 0 HQF
Shaper Backg
124 7952 49094120 0 0.00% 0.01% 0.00% 0 RBSCP
Background
125 0 2 0 0.00% 0.00% 0.00% 0 SCTP
Main Proces
126 0 1 0 0.00% 0.00% 0.00% 0 VPDN
call manage
127 120 196796 0 0.00% 0.00% 0.00% 0
CRM_CALL_UPDATE_
128 0 2 0 0.00% 0.00% 0.00% 0
Diameter Base pr
129 0 1 0 0.00% 0.00% 0.00% 0
Diameter Transpo
130 210076 220739961 0 0.00% 0.00% 0.00% 0
OSPF-700 Hello
131 0 2 0 0.00% 0.00% 0.00% 0 AAA
Cached Serve
132 0 2 0 0.00% 0.00% 0.00% 0 ENABLE
AAA
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
133 0 1 0 0.00% 0.00% 0.00% 0 EM
Background Pr
134 0 1 0 0.00% 0.00% 0.00% 0 Key
chain liveke
135 0 2 0 0.00% 0.00% 0.00% 0 LINE
AAA
136 22964 280213 81 0.00% 0.00% 0.00% 0 LOCAL
AAA
137 0 2 0 0.00% 0.00% 0.00% 0 MPLS
Auto Mesh P
138 0 2 0 0.00% 0.00% 0.00% 0
TPLUS
139 0 2 0 0.00% 0.00% 0.00% 0
VSP_MGR
140 0 2 0 0.00% 0.00% 0.00% 0 Proxy
Session Ap
141 0 1 0 0.00% 0.00% 0.00% 0
CCVPM_HTSP
142 0 1 0 0.00% 0.00% 0.00% 0
CCVPM_R2
143 0 1 0 0.00% 0.00% 0.00% 0 EPHONE
MWI Refre
144 4 5467 0 0.00% 0.00% 0.00% 0 FB/KS
Log HouseK
145 0 2 0 0.00% 0.00% 0.00% 0 EPHONE
MWI BG Pr
146 0 1 0 0.00% 0.00% 0.00% 0 Skinny
HW confer
147 0 1 0 0.00% 0.00% 0.00% 0
CCSWVOICE
148 0 1 0 0.00% 0.00% 0.00% 0 Async
write proc
149 0 1 0 0.00% 0.00% 0.00% 0 http
client proc
150 0 1 0 0.00% 0.00% 0.00% 0 Async
write proc
151 4 1 4000 0.00% 0.00% 0.00% 0
QOS_MODULE_MAIN
152 0 1 0 0.00% 0.00% 0.00% 0
RPMS_PROC_MAIN
153 0 1 0 0.00% 0.00% 0.00% 0 VoIP
AAA
154 0 2 0 0.00% 0.00% 0.00% 0 Dialog
Manager
155 0 2 0 0.00% 0.00% 0.00% 0 crypto
engine pr
156 0 4 0 0.00% 0.00% 0.00% 0 Crypto
CA
157 0 1 0 0.00% 0.00% 0.00% 0 Crypto
PKI-CRL
158 0 1 0 0.00% 0.00% 0.00% 0 encrypt
proc
159 0 2 0 0.00% 0.00% 0.00% 0 crypto
sw pk pro
160 0 1 0 0.00% 0.00% 0.00% 0 IMA
Traps
161 0 2 0 0.00% 0.00% 0.00% 0
Control-plane ho
162 0 1 0 0.00% 0.00% 0.00% 0 DATA
Transfer Pr
163 0 1 0 0.00% 0.00% 0.00% 0 DATA
Collector
164 49652 848757 58 0.00% 0.00% 0.00% 0 AAA
SEND STOP EV
165 0 2 0 0.00% 0.00% 0.00% 0 EEM ED
Resource
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
166 0 2 0 0.00% 0.00% 0.00% 0 EEM ED
Routing
167 0 3 0 0.00% 0.00% 0.00% 0 EEM ED
Track
168 1056 491944 2 0.00% 0.00% 0.00% 0 RMON
Recycle Pro
169 0 2 0 0.00% 0.00% 0.00% 0 RMON
Deferred Se
170 0 1 0 0.00% 0.00% 0.00% 0 Syslog
Traps
171 0 1 0 0.00% 0.00% 0.00% 0 IP SLAs
Ethernet
172 0 1 0 0.00% 0.00% 0.00% 0 RMON
Packets
173 1060 4915489 0 0.00% 0.00% 0.00% 0 trunk
conditioni
174 0 1 0 0.00% 0.00% 0.00% 0 trunk
conditioni
175 4 130 30 0.00% 0.00% 0.00% 0 EEM
Server
176 8 2 4000 0.00% 0.00% 0.00% 0 Call
Home proces
177 0 2 0 0.00% 0.00% 0.00% 0 EEM
Policy Direc
178 0 3 0 0.00% 0.00% 0.00% 0 EEM ED
CLI
179 0 3 0 0.00% 0.00% 0.00% 0 EEM ED
Counter
180 0 3 0 0.00% 0.00% 0.00% 0 EM ED
GOLD
181 0 3 0 0.00% 0.00% 0.00% 0 EEM ED
Interface
182 0 3 0 0.00% 0.00% 0.00% 0 EEM ED
IOSWD
183 0 3 0 0.00% 0.00% 0.00% 0 EEM ED
Ipsla
184 0 3 0 0.00% 0.00% 0.00% 0 EEM ED
None
185 0 2 0 0.00% 0.00% 0.00% 0 EEM ED
Nf
186 0 3 0 0.00% 0.00% 0.00% 0 EEM ED
OIR
187 24 81998 0 0.00% 0.00% 0.00% 0 Call
Home Timer
188 0 3 0 0.00% 0.00% 0.00% 0 EEM ED
SNMP
189 0 2 0 0.00% 0.00% 0.00% 0 EEM ED
SNMP Noti
190 24 123164 0 0.00% 0.00% 0.00% 0 EEM ED
Timer
191 0 3 0 0.00% 0.00% 0.00% 0 EEM ED
Test
192 0 3 0 0.00% 0.00% 0.00% 0 EEM ED
Config
193 0 3 0 0.00% 0.00% 0.00% 0 EEM ED
Env
194 7692 334800 22 0.00% 0.00% 0.00% 0
Syslog
195 0 1 0 0.00% 0.00% 0.00% 0 VPDN
Test
196 0 3 0 0.00% 0.00% 0.00% 0 EEM ED
RPC
197 0 1 0 0.00% 0.00% 0.00% 0 Async
write proc
198 46888 2912443 16 0.00% 0.00% 0.00% 0 Net
Input
PID Runtime(ms) Invoked uSecs 5Sec 1Min 5Min TTY Process
199 9150356 990903 9234 0.15% 0.21% 0.23% 0 Compute
load avg
200 982296 84077 11683 0.00% 0.01% 0.00% 0
Per-minute Jobs
201 32 41001 0 0.00% 0.00% 0.00% 0
CC-API_VCM
202 12784 49095032 0 0.00% 0.01% 0.00% 0
CCPROXY_CT
203 52 81997 0 0.00% 0.00% 0.00% 0 DFS
flush period
204 4 2 2000 0.00% 0.00% 0.00% 0 L2TP
mgmt daemon
205 0 2 0 0.00% 0.00% 0.00% 0 L2TUN
Applicatio
206 524940 43268560 12 0.00% 0.02% 0.02% 0 PPPoE
Background
207 959572 3791035 253 0.00% 0.02% 0.00% 0 PPPoE
Discovery
208 53436 153824745 0 0.07% 0.06% 0.07% 0 PPP
manager
209 780024 157066507 4 0.39% 0.40% 0.39% 0 PPP
Events
210 628 4918882 0 0.00% 0.00% 0.00% 0
Multilink PPP
211 728 202 3603 0.00% 0.00% 0.00% 0 AAA
Per-User
212 8128 98439 82 0.00% 0.00% 0.00% 0 IP
SNMP
213 5472 49225 111 0.00% 0.00% 0.00% 0 PDU
DISPATCHER
214 18952 49237 384 0.00% 0.00% 0.00% 0 SNMP
ENGINE
215 0 2 0 0.00% 0.00% 0.00% 0 IP
SNMPV6
216 0 1 0 0.00% 0.00% 0.00% 0 SNMP
ConfCopyPro
217 0 1 0 0.00% 0.00% 0.00% 0 SNMP
Traps
218 2069092 12260613 168 0.07% 0.05% 0.07% 0
RADIUS
219 3972 4934144 0 0.00% 0.00% 0.00% 0
NTP
220 5280 131778 40 0.00% 0.00% 0.00% 0
Collection proce
221 1549908 394615 3927 0.00% 0.00% 0.00% 0
VTEMPLATE Backgr
222 14274904 9304418 1534 0.00% 0.00% 0.00% 0
OSPF-700 Router
Sorry about the wrapping. The BRAS is not heavily loaded.
Regards,
RH.
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