SET PORT {slot.port} STATIC_SWITCH {enabledisable}

If you try to switch a port with enabled static switch from one segment to another, you will get the an error message. This is shown in Figure 89.

￿

￿

8260> set port 6.1 static_switch enable Port 06.01 static switch set to ENABLED. 8260>

8260> show port 6.1 verbose

Port Display for Module T18PSA :

 

Port

Mode

Status

Network

General Information

-----

--------

------------------- ---------------- --------------------

 

06.01

ENABLED

OKAY

TOKEN_RING_10

 

 

 

Alert

Filter:

 

DISABLED

 

 

 

Port Connector:

 

RJ45S

 

 

 

Dip Network Setting:

TOKEN_RING_1

 

 

 

Static Switch:

 

ENABLED

 

 

8260>

set port

6.1 network token_ring_1

 

 

 

Port 06.01 static switch enabled and phantom present: command aborted.

￿

8260>

 

 

 

 

￿

Figure 89. Switching Ports with Enabled Static Switch

Also, note that apart from the possible problem discussed above, there are some other situations that may cause a problem when you switch an open adapter from one network to another. For example, in Figure 90 on page 148, station

Ais attached to ring 1and is communicating with the SNA host via the 3745 attached to ring FFF″. As the path between station Aand the host involves a

source routing bridge (bridge 1), the Routing Information field used in the frames between station Aand the host contains ring ″1″, bridge ″1 and ring FFF″. Now, if in the middle of your SNA session, you switch station A to ring 2″, the actual path between station Aand the host will change, while station A and the

host still use the old Routing Information field. This will result in the frames sent by station Anot being delivered to the host and vice versa, the frames sent by the host will not be delivered to station A″. The result of this is that your

stations will lose contact and the SNA session will be terminated after your SNA timeout period. Of course, after the session termination, station Acan try to

contact the host using the route discovery in source routing. This will result in the new route (ring ″2″, bridge ″2″, ring FFF″) being discovered and a new

session being established. So, in this case the switching of the port from one segment to another, results in the termination and re-establishment of existing sessions.

Chapter 8. 8260 Token-Ring Support 147

Page 169
Image 169
IBM 8260 manual SET Port slot.port Staticswitch enabledisable, Switching Ports with Enabled Static Switch

8260 specifications

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