10-10-2002 04:52 AM - edited 03-02-2019 01:58 AM
10-10-2002 04:57 AM
Hi ,
when I do a show ip int dialer 0 I receive the following message
Tcp header compression is enabled but not compressing
Do you know what happens ?
rt102#sh run
Building configuration...
Current configuration:
!
version 12.0
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname rt102
!
!
username rt102 password 0 routeur
!
!
!
!
ip subnet-zero
ip cef
!
isdn switch-type basic-net3
isdn voice-call-failure 0
!
!
controller E1 2/0
!
!
!
!
interface Loopback0
ip address 199.0.97.32 255.255.255.0
no ip directed-broadcast
!
interface Ethernet0/0
ip address 76.135.0.32 255.254.0.0
no ip directed-broadcast
shutdown
full-duplex
!
interface BRI1/0
no ip address
no ip directed-broadcast
encapsulation ppp
ip tcp header-compression
dialer rotary-group 0
isdn switch-type basic-net3
isdn sending-complete
!
interface BRI1/1
no ip address
no ip directed-broadcast
shutdown
isdn switch-type basic-net3
!
interface BRI1/2
no ip address
no ip directed-broadcast
shutdown
isdn switch-type basic-net3
!
interface BRI1/3
no ip address
no ip directed-broadcast
shutdown
isdn switch-type basic-net3
!
interface BRI1/4
no ip address
no ip directed-broadcast
shutdown
isdn switch-type basic-net3
!
interface BRI1/5
no ip address
no ip directed-broadcast
shutdown
isdn switch-type basic-net3
!
interface BRI1/6
no ip address
no ip directed-broadcast
shutdown
isdn switch-type basic-net3
!
interface BRI1/7
no ip address
no ip directed-broadcast
shutdown
isdn switch-type basic-net3
!
interface FastEthernet2/0
ip address 199.0.81.30 255.255.255.0
no ip directed-broadcast
speed 10
half-duplex
!
interface Dialer0
ip address 199.0.99.32 255.255.255.0
no ip directed-broadcast
encapsulation ppp
ip tcp header-compression
ip tcp compression-connections 100
dialer in-band
dialer map ip 199.0.99.30 name rt100 broadcast 22200098
dialer load-threshold 1 either
dialer-group 1
ppp multilink
!
router ospf 1
router-id 199.0.97.32
redistribute connected
network 199.0.99.0 0.0.0.255 area 0
!
ip classless
no ip http server
!
dialer-list 1 protocol ip permit
!
line con 0
exec-timeout 3600 0
transport input none
line aux 0
line vty 0 4
login
!
end
rt102#
rt100#sh run
Building configuration...
Current configuration:
!
version 12.0
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname rt100
!
!
username rt100 password 0 routeur
!
!
!
!
ip subnet-zero
ip cef
!
isdn switch-type basic-net3
isdn voice-call-failure 0
!
!
!
!
!
interface Loopback0
ip address 199.0.97.30 255.255.255.0
no ip directed-broadcast
!
interface Ethernet0/0
ip address 76.135.0.30 255.254.0.0
no ip directed-broadcast
shutdown
full-duplex
!
interface BRI1/0
no ip address
no ip directed-broadcast
encapsulation ppp
ip tcp header-compression
dialer rotary-group 0
isdn switch-type basic-net3
isdn sending-complete
!
interface BRI1/1
no ip address
no ip directed-broadcast
shutdown
isdn switch-type basic-net3
!
interface BRI1/2
no ip address
no ip directed-broadcast
shutdown
isdn switch-type basic-net3
!
interface BRI1/3
no ip address
no ip directed-broadcast
shutdown
isdn switch-type basic-net3
!
interface BRI1/4
no ip address
no ip directed-broadcast
shutdown
isdn switch-type basic-net3
!
interface BRI1/5
no ip address
no ip directed-broadcast
shutdown
isdn switch-type basic-net3
!
interface BRI1/6
no ip address
no ip directed-broadcast
shutdown
isdn switch-type basic-net3
!
interface BRI1/7
no ip address
no ip directed-broadcast
shutdown
isdn switch-type basic-net3
!
interface FastEthernet2/0
ip address 199.0.80.30 255.255.255.0
no ip directed-broadcast
duplex auto
speed auto
!
interface Dialer0
ip address 199.0.99.30 255.255.255.0
no ip directed-broadcast
encapsulation ppp
ip tcp header-compression
ip tcp compression-connections 100
dialer in-band
dialer map ip 199.0.99.32 name rt102 broadcast 22200099
dialer load-threshold 1 either
dialer-group 1
ppp multilink
!
router ospf 1
router-id 199.0.97.30
redistribute connected
network 199.0.99.0 0.0.0.255 area 0
!
ip classless
no ip http server
!
dialer-list 1 protocol ip permit
!
line con 0
exec-timeout 3600 0
transport input none
line aux 0
line vty 0 4
login
!
end
rt100#
10-11-2002 10:44 AM
Mst likely cause:
ip tcp header comp must be configured on both sides of the link to work.
when a call is made, in either direction, and one side does not support tcp header compression, it remains disabled.
10-11-2002 11:26 AM
HI,
I just tested this on two of my routers.
One was running IOS version 12.0(7)T2 (R3). and the other running, 12.0(2)XC2 (R2). I enabled tcp header compression on the physical bri interface (you have it on the dialer, since you are using dialer profiles.)
On R3, show ip int bri 0/0 was displaying as.... follows.
TCP/IP header compression is enabled and not compressing
On R2, show ip int bri 0/0 was displaying as .....follows.
TCP/IP header compression is enabled and compressing
So one end was showing it as enabled and working, while the other end was showing it as enabled, but not working.
But when i issued a telnet from R3 to R2 and vice versa, the statistics of TCP header compression on both routers are as follows.
R3>sh ip tcp header-compression
TCP/IP header compression statistics:
Interface BRI0/0:
Rcvd: 0 total, 0 compressed, 0 errors
0 dropped, 0 buffer copies, 0 buffer failures
Sent: 0 total, 0 compressed,
0 bytes saved, 0 bytes sent
Connect: 16 rx slots, 16 tx slots, 0 long searches, 0 misses
Interface BRI0/0:1:
Rcvd: 32 total, 30 compressed, 0 errors
0 dropped, 0 buffer copies, 0 buffer failures
Sent: 28 total, 26 compressed,
832 bytes saved, 293 bytes sent
3.83 efficiency improvement factor
Connect: 16 rx slots, 16 tx slots, 2 long searches, 2 misses
93% hit ratio, five minute miss rate 0 misses/sec, 0 max
Interface BRI0/0:2:
Rcvd: 0 total, 0 compressed, 0 errors
0 dropped, 0 buffer copies, 0 buffer failures
Sent: 0 total, 0 compressed,
0 bytes saved, 0 bytes sent
Connect: 16 rx slots, 16 tx slots, 0 long searches, 0 misses
and on R2
there is no output for sh ip tcp header compression command.
Probably this could be a bug in these IOSes, and also I think, output varies from IOS to IOS.
Shanky
10-11-2002 11:27 AM
I found a bug which might be related to my previous reply.
Let us know what is the IOS you are running on each router.
The bug id is CSCdk38062 -
Bug description - show ip tcp header-compression counters not updated on dialer intfs.
This could be a reason why, my router R2 was not showing the counters properly, even though header compression was working either ways.
Get back with us, with the IOS u r using.
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