
Troubleshooting DLSw
304233-A Rev. 00
C-41
Figure C-13. Primary to Secondary SDLC Using DLSw Single Switch SNA/Frame Relay
Frame Relay
network
End
station
Router
Single switch DLSw
SDLC to Frame Relay
Router
Single switch DLSw
SDLC to Frame Relay
DLS0053A
Host
CO_ISAP_REG
(req)
Set_Mode_Send
(req)
Set_Mode_Rev
Set_Mode_Send
(rsp)
CO_ISAP_REG
(rsp)
SNRM
RR/RR
RR/RR
RR/RR
RR/RR
RR/RR
RR/RR
RR/RR
UA
TEST Cmd
SNRM
(see Note 3)
TEST Rsp
XID-null(req)
UA
UA
RR
RNR
RNR
SABME
CANUREACH
ICANUREACH
ICANUREACH
CONNECT_SEND
(req)
CONNECT_SEND
(rsp)
Set_Mode_Send
(rsp)
Connect_Rcv
(Req)
Connect_Rcv
(Rsp)
CANUREACH
REACHACKREACHACK
CONTACTED
CONTACTED
XIDFRAME (null)
XIDFRAME (null)
RR/RR
XID-null(rsp)
XIDFRAME (null)
XIDFRAME (null)
CONTACT CONTACT
Notes:
1) If enabled. Preactivation frames are sent here.
2) All events in italics are internal to the router.
3) The Host may send SNRM several times prior to the one shown here.
This is the first time that the router will accept it.
(See Note 1)
(See Note 2)
XIDFRAME (T2.0)XIDFRAME (T2.0)
I-FRAMES
I-FRAMES
I-FRAMES
INFOFRAMES
INFOFRAMES
CO_ISAP_REG
(req)
CO_ISAP_REG
(rsp)
SDLC
SDLC
XID T2.0
RR
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