11-26-2003
11:59 PM
- last edited on
03-25-2019
02:49 PM
by
ciscomoderator
Hi,
here works many E1-connectoins (PRI dial-connectoins) from different
routers (3620 or 26xx) with e1 interfaces to AS5400 (with only e1) and
an C7509 with e1-interfaces.
For many routers that works properly but on some whe have many problems
with the performance. In the output for show ppp multlink, i can see on
this routers many lost fragments. Have you some tips for me?
Here is a smpleconfig:
ROUTER-BeschA#sh run
Building configuration...
Current configuration : 1571 bytes
!
version 12.2
service timestamps debug datetime msec localtime show-timezone
service timestamps log datetime msec localtime show-timezone
service password-encryption
!
hostname ROUTER
!
username cisco1 password xyz
username dallas password xyz
memory-size iomem 30
clock timezone UTC 1
clock summer-time MESZ recurring last Sun Mar 2:00 last Sun Oct 2:00
ip subnet-zero
no ip gratuitous-arps
ip cef
!
!
no ip domain-lookup
!
isdn switch-type primary-net5
!
controller E1 1/0
pri-group timeslots 1-31
!
!
!
interface Loopback10
ip address 10.1.2.3 255.255.255.255
!
interface Ethernet0/0
ip address 10.0.1.1 255.255.255.0
half-duplex
no cdp enable
!
interface Serial1/0:15
ip unnumbered Loopback10
encapsulation ppp
no ip route-cache cef
ip mroute-cache
no logging event link-status
load-interval 30
dialer enable-timeout 6
dialer wait-for-carrier-time 5
dialer string 1
dialer hold-queue 100
dialer load-threshold 80 either
dialer-group 1
isdn switch-type primary-net5
ppp authentication chap
ppp multilink
ppp multilink interleave
ppp timeout multilink link remove 20
!
ip classless
ip route 10.0.0.0 255.0.0.0 Serial1/0:15
no ip http server
!
dialer-list 1 protocol ip permit
snmp-server community XXX RO
snmp-server enable traps tty
!
line con 0
exec-timeout 0 0
line aux 0
line vty 0 4
password xyz
login
!
ntp server 10.9.8.7
end
and an show ppp multilink
ROUTER#sh pp mu
Virtual-Access1, bundle name is dallas
Bundle up for 2d22h
Dialer interface is Serial1/0:15
14233 lost fragments, 1283236 reordered, 0 unassigned
31045 discarded, 509 lost received, 78/255 load
0x377D9E received sequence, 0x228CC8 sent sequence
Member links: 12 (max not set, min not set)
Se1/0:26, since 2d22h, last rcvd seq 377D96, 240 weight, 232 frag size
Se1/0:23, since 2d22h, last rcvd seq 377D9A, 240 weight, 232 frag size
Se1/0:24, since 2d22h, last rcvd seq 377D9B, 240 weight, 232 frag size
Se1/0:12, since 2d22h, last rcvd seq 377D9C, 240 weight, 232 frag size
Se1/0:2, since 2d22h, last rcvd seq 377D9D, 240 weight, 232 frag size
Se1/0:30, since 00:02:08, last rcvd seq 377D8A, 240 weight, 232 frag
size
Se1/0:29, since 00:01:53, last rcvd seq 377D8B, 240 weight, 232 frag
size
Se1/0:28, since 00:00:46, last rcvd seq 377D95, 240 weight, 232 frag
size
Se1/0:27, since 00:00:34, last rcvd seq 377D8D, 240 weight, 232 frag
size
Se1/0:25, since 00:00:18, last rcvd seq 377D8E, 240 weight, 232 frag
size
Se1/0:22, since 00:00:12, last rcvd seq 377D8F, 240 weight, 232 frag
size
Se1/0:21, since 00:00:06, last rcvd seq 377D90, 240 weight, 232 frag
size
thx for any tips
Gerd Thuemmler
Germany
Sorry for my bad english, but its so long that learn it in scool
11-27-2003 03:09 AM
Hello Gerd,
the lost fragments might be due to idle links. Just for testing purposes, can you remove the ´ppp timeout multilink link remove 20´ from your configuration and set the minimum member links to 12 (the actual maximum) ?
Also, check out this link for a very detailed explanantion of fragment loss (have a look at chapter 4 of this document):
http://rfc.sunsite.dk/rfc/rfc1990.html
Regards,
Georg
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