[cisco-bba] Low bandwidth throuput on 7206 acting as LNS
Thomas Koeppe
thomas_k_1 at gmx.net
Sun Sep 9 08:41:15 EDT 2007
Hi,
we're working on a test szenario to terminate a small number of PPPoE
users comming in through a l2tp tunnel. It seems that all works fine
(l2tp tunnel is comming up, authentication and accounting against
Freeradius server will work) except the low bandwidth throughput problem.
As LNS we run a Cisco 7206 nonVXR with NPE-200, 96 MB RAM and 1
FE-Interface. LAC is provided and maintained by our upstream telco. I
know they run a Cisco 7206 VXR with NPE-G1.
During the test setup there was only one customer connected to the lns.
(2 Mbit/s down, 192 kbit/s up) Throughput after terminating the session
on the lns was ~ 180 kbit/s down and ~ 160 kbit/s up.
Any ideas how to fix this? Does someone see things which I doesn't see?
Thanks,
Thomas
Here some configs and diagnostic output:
CPU load during the tests is 0%:
------------------
lns1#sh proc cpu
CPU utilization for five seconds: 0%/0%; one minute: 0%; five minutes: 0%
------------------
------------------
lns1#sh ip traffic
IP statistics:
Rcvd: 25311277 total, 6224 local destination
0 format errors, 0 checksum errors, 307283 bad hop count
0 unknown protocol, 1 not a gateway
0 security failures, 0 bad options, 45 with options
Opts: 0 end, 0 nop, 0 basic security, 0 loose source route
0 timestamp, 0 extended security, 0 record route
0 stream ID, 0 strict source route, 45 alert, 0 cipso, 0 ump
0 other
Frags: 0 reassembled, 0 timeouts, 0 couldn't reassemble
4445 fragmented, 2 couldn't fragment
Bcast: 80 received, 0 sent
Mcast: 0 received, 0 sent
Sent: 313727 generated, 24991606 forwarded
Drop: 192 encapsulation failed, 1 unresolved, 0 no adjacency
1 no route, 0 unicast RPF, 0 forced drop
0 options denied
Drop: 0 packets with source IP address zero
ICMP statistics:
Rcvd: 0 format errors, 16 checksum errors, 0 redirects, 0 unreachable
11 echo, 0 echo reply, 0 mask requests, 0 mask replies, 0 quench
0 parameter, 0 timestamp, 0 info request, 0 other
0 irdp solicitations, 0 irdp advertisements
Sent: 0 redirects, 65 unreachable, 0 echo, 11 echo reply
0 mask requests, 0 mask replies, 0 quench, 0 timestamp
0 info reply, 306439 time exceeded, 0 parameter problem
0 irdp solicitations, 0 irdp advertisements
TCP statistics:
Rcvd: 3457 total, 0 checksum errors, 4 no port
Sent: 3126 total
UDP statistics:
Rcvd: 2740 total, 0 checksum errors, 122 no port
Sent: 4100 total, 0 forwarded broadcasts
------------------
------------------
lns1#sh ver
Cisco Internetwork Operating System Software
IOS (tm) 7200 Software (C7200-JK9O3S-M), Version 12.3(5a)B3, RELEASE
SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2004 by cisco Systems, Inc.
Compiled Mon 08-Nov-04 17:56 by leccese
Image text-base: 0x60008AF4, data-base: 0x62224000
ROM: System Bootstrap, Version 11.1(13)CA, EARLY DEPLOYMENT RELEASE
SOFTWARE (fc1)
BOOTLDR: 7200 Software (C7200-BOOT-M), Version 12.0(5)T1, RELEASE
SOFTWARE (fc1)
lns1 uptime is 3 days, 14 hours, 51 minutes
System returned to ROM by reload at 22:29:54 MET Wed Sep 5 2007
System restarted at 22:57:37 MET Wed Sep 5 2007
System image file is "tftp://x.x.x.x/c7200-jk9o3s-mz.123-5a.B3.bin"
Last reload reason: Reload command
This product contains cryptographic features and is subject to United
States and local country laws governing import, export, transfer and
use. Delivery of Cisco cryptographic products does not imply
third-party authority to import, export, distribute or use encryption.
Importers, exporters, distributors and users are responsible for
compliance with U.S. and local country laws. By using this product you
agree to comply with applicable laws and regulations. If you are unable
to comply with U.S. and local laws, return this product immediately.
A summary of U.S. laws governing Cisco cryptographic products may be
found at:
http://www.cisco.com/wwl/export/crypto/tool/stqrg.html
If you require further assistance please contact us by sending email to
export at cisco.com.
cisco 7206 (NPE200) processor (revision B) with 81920K/16384K bytes of
memory.
Processor board ID 18279030
R5000 CPU at 200MHz, Implementation 35, Rev 2.1, 512KB L2 Cache
6 slot midplane, Version 1.3
Last reset from power-on
Bridging software.
X.25 software, Version 3.0.0.
SuperLAT software (copyright 1990 by Meridian Technology Corp).
TN3270 Emulation software.
Number of Fast PAs = 1
Number of Fast+Medium PAs = 1
Total number of PA bandwidth points = 200
1 FastEthernet/IEEE 802.3 interface(s)
125K bytes of non-volatile configuration memory.
4096K bytes of packet SRAM memory.
126000K bytes of ATA PCMCIA card at slot 1 (Sector size 512 bytes).
4096K bytes of Flash internal SIMM (Sector size 256K).
------------------
------------------
lns1#sh run
Building configuration...
Current configuration : 2345 bytes
!
! Last configuration change at 18:24:30 MET Thu Sep 6 2007 by root
!
version 12.3
no service pad
service timestamps debug datetime localtime
service timestamps log datetime localtime
no service password-encryption
!
hostname lns1
!
boot-start-marker
boot system tftp c7200-jk9o3s-mz.123-5a.B3.bin x.x.x.x
boot-end-marker
!
enable secret 5 xxxxxxxxxxx
enable password xxxxxxxxxxx
!
clock timezone GMT 1
clock summer-time MET recurring last Sun Mar 3:00 last Sun Oct 3:00
aaa new-model
!
!
aaa group server radius ourradius
server x.x.x.x auth-port 1812 acct-port 1813
!
aaa authentication login default group ourradius local
aaa authentication ppp Upstream-AAA group ourradius
aaa authorization network Upstream-AAA group ourradius
aaa accounting delay-start
aaa accounting network Upstream-AAA start-stop group ourradius
aaa session-id common
ip subnet-zero
!
!
ip name-server x.x.x.x
!
ip cef
ip audit notify log
ip audit po max-events 100
vpdn enable
!
vpdn-group 1
accept-dialin
protocol l2tp
virtual-template 1
terminate-from hostname xxxxxxxxxxxxxx
lcp renegotiation on-mismatch
l2tp tunnel password 7 xxxxxxxxxxxxxxx
!
no ftp-server write-enable
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
interface FastEthernet1/0
ip address x.x.x.x 255.255.255.0
no ip mroute-cache
duplex full
!
interface Virtual-Template1
description Customer DSL-Sessions via L2TP
mtu 1456
ip unnumbered FastEthernet1/0
ip tcp adjust-mss 1416
no peer default ip address
ppp authentication pap chap Upstream-AAA
ppp authorization Upstream-AAA
ppp accounting Upstream-AAA
ppp ipcp dns x.x.x.x y.y.y.y
ppp multilink
!
ip default-gateway x.x.x.x
ip classless
ip route 0.0.0.0 0.0.0.0 x.x.x.x
ip http server
no ip http secure-server
!
!
ip radius source-interface FastEthernet1/0
dialer-list 1 protocol ip permit
!
snmp-server community xxxxxxxxx RW 1
snmp-server enable traps tty
!
!
radius-server host x.x.x.x auth-port 1812 acct-port 1813
radius-server key verysecret
!
!
!
!
gatekeeper
shutdown
!
!
line con 0
stopbits 1
line aux 0
stopbits 1
line vty 0 4
password verysecret
!
ntp clock-period 17179687
ntp server 134.169.10.65
!
!
end
------------------
------------------
lns1#sh interfaces
FastEthernet1/0 is up, line protocol is up
Hardware is DEC21140, address is 0002.177a.541c (bia 0002.177a.541c)
Internet address is x.x.x.x/24
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 100Mb/s, 100BaseTX/FX
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:03, output 00:00:00, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/6170/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 33000 bits/sec, 56 packets/sec
5 minute output rate 32000 bits/sec, 55 packets/sec
2123733 packets input, 207662657 bytes
Received 66077 broadcasts, 0 runts, 0 giants, 111 throttles
6136 input errors, 6130 CRC, 0 frame, 0 overrun, 6 ignored
0 watchdog
0 input packets with dribble condition detected
2069898 packets output, 204290945 bytes, 0 underruns
0 output errors, 0 collisions, 2 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier
0 output buffer failures, 0 output buffers swapped out
Virtual-Access1 is down, line protocol is down
Hardware is Virtual Access interface
MTU 1500 bytes, BW 100000 Kbit, DLY 100000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation PPP, LCP Closed
Base VtMgr vaccess
Vaccess status 0x0, loopback not set
DTR is pulsed for 5 seconds on reset
Last input never, output never, output hang never
Last clearing of "show interface" counters 13:29:56
Input queue: 0/4096/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
0 packets input, 0 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
0 packets output, 0 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
Virtual-Template1 is down, line protocol is down
Hardware is Virtual Template interface
Description: Customer DSL-Sessions via L2TP
Interface is unnumbered. Using address of FastEthernet1/0 (x.x.x.x)
MTU 1456 bytes, BW 100000 Kbit, DLY 100000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation PPP, LCP Closed, multilink Closed
Closed: BACP, loopback not set
DTR is pulsed for 5 seconds on reset
Last input never, output never, output hang never
Last clearing of "show interface" counters 13:30:00
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
0 packets input, 0 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
0 packets output, 0 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
Virtual-Access2 is up, line protocol is up
Hardware is Virtual Access interface
MTU 1456 bytes, BW 100000 Kbit, DLY 100000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation PPP, LCP Closed
Base PPPoVPDN vaccess
Vaccess status 0x44, loopback not set
DTR is pulsed for 5 seconds on reset
Last input 00:00:01, output never, output hang never
Last clearing of "show interface" counters 13:25:55
Input queue: 0/4096/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 1000 bits/sec, 1 packets/sec
5 minute output rate 2000 bits/sec, 2 packets/sec
21241 packets input, 2571661 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
25680 packets output, 31850299 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
Virtual-Access2.1 is up, line protocol is up
Hardware is Virtual Access interface
Interface is unnumbered. Using address of FastEthernet1/0 (x.x.x.x)
MTU 1456 bytes, BW 2303 Kbit, DLY 100000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation PPP, LCP Open, multilink Closed
Open: IPCP
PPPoVPDN vaccess, cloned from Virtual-Template1
Vaccess status 0x0
Protocol l2tp, tunnel id 21458, session id 23
29 packets input, 4011 bytes
36 packets output, 8051 bytes
Last clearing of "show interface" counters never
------------------
------------------------
lns1#sh int f1/0
FastEthernet1/0 is up, line protocol is up
Hardware is DEC21140, address is 0002.177a.541c (bia 0002.177a.541c)
Internet address is x.x.x.x/24
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 100Mb/s, 100BaseTX/FX
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/6917/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 31000 bits/sec, 45 packets/sec
5 minute output rate 31000 bits/sec, 43 packets/sec
2539812 packets input, 254188347 bytes
Received 84953 broadcasts, 0 runts, 0 giants, 130 throttles
8239 input errors, 8233 CRC, 0 frame, 0 overrun, 6 ignored
0 watchdog
0 input packets with dribble condition detected
2468801 packets output, 250163028 bytes, 0 underruns
0 output errors, 0 collisions, 2 interface resets
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier
0 output buffer failures, 0 output buffers swapped out
------------------------
------------------------
lns1#sh ip cef sum
IP CEF with switching (Table Version 49), flags=0x0
11 routes, 0 reresolve, 0 unresolved (0 old, 0 new), peak 2
14 leaves, 11 nodes, 13344 bytes, 51 inserts, 37 invalidations
0 load sharing elements, 0 bytes, 0 references
universal per-destination load sharing algorithm, id E7F267BA
2(0) CEF resets, 1 revisions of existing leaves
Resolution Timer: Exponential (currently 1s, peak 1s)
1 in-place/0 aborted modifications
refcounts: 3088 leaf, 3072 node
Table epoch: 0 (14 entries at this epoch)
Adjacency Table has 5 adjacencies
------------------------
lns1#sh int f1/0 switching
FastEthernet1/0
Throttle count 130
Drops RP 6917 SP 0
SPD Flushes Fast 0 SSE 0
SPD Aggress Fast 0
SPD Priority Inputs 198 Drops 0
Protocol IP
Switching path Pkts In Chars In Pkts Out Chars Out
Process 26267 2144448 26950 1912963
Cache misses 0 - - -
Fast 2450083 248430249 2445096 248353080
Auton/SSE 0 0 0 0
Protocol DEC MOP
Switching path Pkts In Chars In Pkts Out Chars Out
Process 0 0 95 7315
Cache misses 0 - - -
Fast 0 0 0 0
Auton/SSE 0 0 0 0
Protocol ARP
Switching path Pkts In Chars In Pkts Out Chars Out
Process 78433 4705980 193 11580
Cache misses 0 - - -
Fast 0 0 0 0
Auton/SSE 0 0 0 0
Protocol CDP
Switching path Pkts In Chars In Pkts Out Chars Out
Process 0 0 951 351837
Cache misses 0 - - -
Fast 0 0 0 0
Auton/SSE 0 0 0 0
Protocol Other
Switching path Pkts In Chars In Pkts Out Chars Out
Process 0 0 5705 342300
Cache misses 0 - - -
Fast 0 0 4445 257810
Auton/SSE 0 0 0 0
NOTE: all counts are cumulative and reset only after a reload.
------------------------
lns1#sh ip int f1/0
FastEthernet1/0 is up, line protocol is up
Internet address is x.x.x.x/24
Broadcast address is 255.255.255.255
Address determined by non-volatile memory
MTU is 1500 bytes
Helper address is not set
Directed broadcast forwarding is disabled
Outgoing access list is not set
Inbound access list is not set
Proxy ARP is enabled
Local Proxy ARP is disabled
Security level is default
Split horizon is enabled
ICMP redirects are always sent
ICMP unreachables are always sent
ICMP mask replies are never sent
IP fast switching is enabled
IP fast switching on the same interface is disabled
IP Flow switching is disabled
IP CEF switching is enabled
IP Feature Fast switching turbo vector
IP Feature CEF switching turbo vector
IP multicast fast switching is disabled
IP multicast distributed fast switching is disabled
IP route-cache flags are Fast, CEF
Router Discovery is disabled
IP output packet accounting is disabled
IP access violation accounting is disabled
TCP/IP header compression is disabled
RTP/IP header compression is disabled
Policy routing is disabled
Network address translation is disabled
WCCP Redirect outbound is disabled
WCCP Redirect inbound is disabled
WCCP Redirect exclude is disabled
BGP Policy Mapping is disabled
------------------------
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