10-30-2005 12:48 AM - edited 03-03-2019 10:50 AM
hi
i have a RS232 device that connect to 2600 router and the router configuration is:
interface Serial0/1
no ip address
encapsulation sdlc
no keepalive
nrzi-encoding
clockrate 19200
sdlc role primary
sdlc vmac 4000.0018.6600
sdlc address A5
sdlc xid A5 05D018A5
sdlc partner 6600.0000.9918 A5
sdlc line-speed 19200
sdlc dlsw default
This is a cisco router with DLSW configuration and i have a problem with the work speed of the device,any operations took many time more than the same device how connect to ibm router,why that maybee configuration or ios.
please answer me.
it very urgent.
Thanks.
10-30-2005 03:27 AM
Hello,
how are your dlsw peers defined ? Can you post the full configuration of the router ? Also, can you check if it makes a difference if you configure 'bandwidth 19200' on the serial interface ?
Regards,
GP
10-30-2005 04:02 AM
hostname RS444
!
logging buffered 10000 debugging
aaa new-model
aaa authentication login default group tacacs+ local
aaa authentication login no_tacacs local enable
aaa authentication enable default group tacacs+ enable
aaa accounting exec default start-stop group tacacs+
aaa accounting commands 15 default start-stop group tacacs+
aaa accounting network default start-stop group tacacs+
aaa accounting connection default start-stop group tacacs+
enable secret 5 $1$a2Ru$r.Aq8LBi30U4o/wrwPDVg/
!
username service privilege 15 password 7 05051C043666666
username Center-2 password 0 rtaui
memory-size iomem 15
ip subnet-zero
no ip source-route
ip cef
!
!
ip telnet hidden addresses
no ip domain-lookup
!
no ip bootp server
isdn switch-type basic-net3
call rsvp-sync
!
dlsw local-peer peer-id 197.12.118.51
dlsw remote-peer 0 tcp 10.20.0.242
dlsw remote-peer 0 tcp 198.17.97.51 backup-peer 10.20.0.242 linger 0
dlsw icannotreach sap E0 F0
dlsw bridge-group 10
!
interface Loopback0
ip address 197.12.118.51 255.255.255.255
!
interface Loopback1
no ip address
!
interface FastEthernet0/0
ip address 212.16.184.51 255.255.255.0
speed 100
full-duplex
bridge-group 10
!
interface Serial0/0
description conected to 2621 dlsw #292 line code 132825555 ***
bandwidth 128
backup delay 5 5
backup interface Dialer1
ip address 192.163.148.2 255.255.255.0
encapsulation ppp
fair-queue
!
interface BRI0/0
no ip address
encapsulation ppp
dialer pool-member 1
isdn switch-type basic-net3
ppp authentication chap
ppp multilink
!
interface FastEthernet0/1
no ip address
speed 100
full-duplex
!
interface Serial0/1
no ip address
encapsulation sdlc
no keepalive
nrzi-encoding
clockrate 19200
sdlc role primary
sdlc vmac 4000.0018.6600
sdlc N1 35216
sdlc address A5
sdlc xid A5 05D018A5
sdlc partner 6600.0000.9918 A5
sdlc line-speed 19200
sdlc dlsw default
!
interface Dialer1
ip address 2.2.2.2 255.255.255.252
encapsulation ppp
dialer pool 1
dialer remote-name Center-2
dialer idle-timeout 121
dialer string 6233305
dialer load-threshold 1 either
dialer-group 1
ppp authentication chap
ppp multilink
!
router rip
version 2
redistribute connected
passive-interface default
no passive-interface Serial0/0
no passive-interface BRI0/0
no passive-interface Dialer1
network 2.0.0.0
network 192.168.118.0
network 197.12.118.0
network 212.16.184.0
no auto-summary
!
ip classless
ip route 0.0.0.0 0.0.0.0 192.163.148.1
ip route 0.0.0.0 0.0.0.0 Dialer1 40
ip tacacs source-interface Loopback0
no ip http server
!
logging source-interface Loopback0
logging 10.89.55.230
access-list 1300 permit 10.19.99.230
access-list 1300 permit 10.19.99.231
access-list 1300 permit 10.16.48.236
access-list 101 permit ip 0.0.0.240 255.255.255.0 any
access-list 101 permit ip 10.10.0.0 0.0.0.255 any
access-list 101 permit ip 10.200.0.0 0.0.0.255 any
access-list 101 permit ip 10.19.99.0 0.0.0.255 any
access-list 101 permit ip 10.209.99.0 0.0.0.255 any
access-list 101 permit ip 10.19.199.0 0.0.0.255 any
access-list 101 permit ip host 12.0.0.3 any
access-list 101 permit ip 10.0.0.0 0.255.255.255 any
access-list 101 remark ***Permit_Telnet***
access-list 101 permit ip host 10.20.0.242 any
dialer-list 1 protocol ip permit
tacacs-server host 10.89.49.225 single-connection
no tacacs-server directed-request
bridge 10 protocol ieee
!
dial-peer cor custom
!
!
alias exec ct conf t
alias exec siib sh ip inter brief
!
line con 0
privilege level 15
logging synchronous
login authentication no_tacacs
line aux 0
line vty 0 4
logging synchronous
!
end
10-30-2005 04:25 AM
Hello,
you could try to set the MTU size on the serial interface to 4400, this is what e.g. the IBM 2212 uses (while Cisco defaults to 1500):
interface Serial0/1
mtu 4400
Also, can you do a 'sdlc test serial 0/1 A5', this will send 10 test frames to the other side (A5) and tell you if there are errors...
Also, make sure that whatever is connected to your FastEthernet0/0 interface has the same fixed speed and duplex setting (100/Full)...
Regards,
GP
10-30-2005 05:01 AM
the mtu 4400 not resolve the problem.
do you have another idea?
thanks.
10-30-2005 11:41 AM
Menash
I notice that the link from this router to its peer appears to be 128 K. Also that you are running DLSW on the Ethernet, along with IP traffic. I wonder if the 128K link is a bottleneck.
I also wonder if the load on this router is the same as the load on the IBM router. When the SDLC device was connected to the IBM router was the IBM router also doing DLSW on the Ethernet and was its uplink also 128 K?
I also notice that there are two access lists defined on the router (101 and 1300) which are not assigned to anything in this config. Where did they come from and what are they doing?
HTH
Rick
10-30-2005 10:36 PM
Hello,
following up on Rick's suggestion that the bandwidth might be a bottleneck, you might want to try and allow only SNA traffic, and not send any NetBIOS packets. You can configure this as following:
access-list 200 permit 0x0000 0x0d0d
dlsw remote-peer 0 tcp 10.20.0.242 lsap-output-list 200
Also, I did some more research on the default MTU size on the IBM 2212, it is 2048, you might want to try that on your serial interface:
interface Serial0/1
mtu 2048
Regards,
GP
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