[Devmon] Cisco ATM interfaces and ignoring "Undefined" non-primary aliases

[Buchan M. <bg...@st...>]

Our 7613s have ATM interfaces, but the ATM interfaces seem to generate a few 
entries in the if_* tables, e.g.:


Ifc name  Ifc Speed  Rate in (load %)  Rate out (load %)
AT2/0/0 [---Link to XXX---]  10.24 Mbps &green   242.14 Kbps (2.36%)green   
81.06 Kbps (0.79%)
  AT2/0/0  0.00 bps &clear   Undefined (Undefined%) &clear   Undefined 
(Undefined%)
  AT2/0/0 [---Link to XXX---]  10.24 Mbps &clear   Undefined (Undefined%)clear   
Undefined (Undefined%)
  AT2/0/0  0.00 bps &green   208.80 Kbps (0.00%)green   58.26 Kbps (0.00%)
  AT2/0/0 [---Link to XXX---]  10.24 Mbps &green   0.00 bps (0.00%)green   
0.00 bps (0.00%)
AT2/0/0.100  10.24 Mbps &clear   Undefined (Undefined%) &clear   Undefined 
(Undefined%)
  AT2/0/0.100  10.24 Mbps &green   212.23 Kbps (2.07%) &green   58.26 Kbps 
(0.57%)

Resulting in the page being clear (all other interfaces are green).



The RRD lines looked like this:

AT2_0_0 4213081072:2657713504
AT2_0_0 U:U
AT2_0_0 U:U
AT2_0_0 1860389811:3500381518
AT2_0_0 0:0
AT2_0_0.100 U:U
AT2_0_0.100 1860389811:3500381518


The options in fixing this seem to be:
1)Extend the exceptions feature to address non-primary aliases (since both the 
valid and invalid entries have the same primary alias), so we can except 
on "Undefined" or "0.00 bps" on a per-template-test basis
2)Ignore rows from a repeater table where one of the repeaters is undefined:

I've done (2) on the devmon instance in question:

Index: modules/dm_tests.pm
===================================================================
--- modules/dm_tests.pm (revision 30)
+++ modules/dm_tests.pm (working copy)
@@ -1799,8 +1799,9 @@
            # Get our oid vars
             my $val   = $oid_h->{'val'}{$leaf};
             my $color = $oid_h->{'color'}{$leaf};
-            $val      = 'Undefined' if !defined $val;
-            $color    = 'clear' if !defined $color;
+           #$val      = 'Undefined' if !defined $val;
+           #$color    = 'clear' if !defined $color;
+           next T_LEAF if !defined $val;

            # Check the exception types, if it is an 'ignore'
            # dont include this leaf row if the data for this


and now I get:

AT2/0/0 [---Link to XXX---]  10.24 Mbps &green   190.25 Kbps (1.86%) &green   
52.06 Kbps (0.51%)
  AT2/0/0  0.00 bps &green   8.13 Kbps (0.00%) &green   39.47 Kbps (0.00%)
  AT2/0/0 [---Link to XXX---]  10.24 Mbps &green   0.00 bps (0.00%) &green   
0.00 bps (0.00%)

The RRD lines still look the same:

AT2_0_0 1766267040:3175078912
AT2_0_0 U:U
AT2_0_0 U:U
AT2_0_0 3440140912:3883766474
AT2_0_0 0:0
AT2_0_0.100 U:U
AT2_0_0.100 3440140912:3883766474

So, I get a few graphs I don't need, however the page is green now.

So, should rows with undefined non-primary aliases be ignored by default? Or, 
should it be possible to add them as exceptions per-template-test?

Regards,
Buchan