Configuring Source Routing
Page 17-41
Disabling SAP filtering
To disable the SAP feature, use the srsf command as shown:
1. Enter the
srsf at the system prompt.
2. The following message is displayed:
SAP Filter support is ON, set it to OFF? (n) :
Enter y and press <return>.
3. The following message is displayed:
Remove all SAP Filter values? (n) :
Enter a y to remove the configured filters, or an n to keep configured filters, and press
<return>. See Configuring SAP Filtering on page 17-41 for information on how to set up a
SAP filter.
4. Another message is displayed confirming the deactivation of the SAP filtering feature:
SAP Filter Support is now “OFF”
Configuring SAP Filtering
Once SAP filtering is activated, it is necessary to configure the filter value. This value is
compared to the value of the packets DSAP and SSAP fields. Filters consist of 4 alphanumeric
bits, 2 for the DSAP and 2 for SSAP. After enabling SAP filtering, another column is added to
the src command, and four prompts are added to the ring configuration options.
To configure the filter value:
1. Enter the
src command at the system prompt. The following screen is displayed:
Source Routing Parameters for Group 1 (Default GROUP (#1))
Slot Type/ Ring Bridge Largest HopCnt Port Block SAP
Intf Inst/Srvc Number Number frame In Out Type ARE Filter
----- ------------------ ------------- ------------ ---------- --- ----- ------- --------- ---------
1. 2/ 1 Brg/ 1/ na 1 (0x001) 10 (0xA) 590 6 6 SRT n
2. 3/ 1 Brg/ 1/ na (V) 2 (0x002) 10 (0xA) 4472 7 7 SRT n
3. 3/ 2 Brg/ 1/ na 4 (0x004) 10 (0xA) 4472 7 7 SRT n
4. 3/ 3 Brg/ 1/ na 5 (0x005) 10 (0xA) 4472 6 6 SRT n
5. 3/ 4 Brg/ 1/ na 3 (0x003) 10 (0xA) 4472 7 7 SRT n
6. 3/ 5 Brg/ 1/ na (V) 2 (0x002) 10 (0xA) 4472 7 7 SRT n
7. 3/ 6 Brg/ 1/ na (V) 3 (0x003) 10 (0xA) 4472 7 7 SRT n
Enter index of the entry to configure (e.g. 1) <RETURN> to exit :
2. Enter the index number (on the far left) for the ring you want to filter.
3. Several prompts for configuring the ring are displayed. Follow the prompts and enter
the values required, or accept the current values if the ring is already configured. The
following prompt is shown:
Output SAP Deny Filter 1 (0000):
Enter the SAP value that the first deny filter should screen. Any packet matching this filter
will be rejected. Excepting the default of 0000 is the same as not having a filter.
