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This prevents the L2 packet forwarding to properly happen in a VM environment (and possibly other data traffic functions in OPX VM).
The sai_vm_dn_rules.sh is in the "cfg" directory.
Issue discovered in OPX 2.3.1
Workaround:
The VM port initialization presently does not implement port speed as well as requests several other attributes which are requested by the upper layers.
As a result the log fills up with messages like this:
Mar 15 14:29:13 uml-switch opx_nas_daemon[2480]: [ev_log_t_SAI_PORT:Switch Id: 0], Attr get for port id 0x1000000000004's attr index 0 attr id 8 failed with err -65536
Mar 15 14:29:13 uml-switch opx_nas_daemon[2480]: [ev_log_t_SAI_PORT:Switch Id: 0], Attr get for port id 0x1000000000005's attr index 0 attr id 8 failed with err -65536
Mar 15 14:29:13 uml-switch opx_nas_daemon[2480]: [ev_log_t_SAI_PORT:Switch Id: 0], Attr get for port id 0x1000000000006's attr index 0 attr id 8 failed with err -65536
Mar 15 14:29:13 uml-switch opx_nas_daemon[2480]: [ev_log_t_SAI_PORT:Switch Id: 0], Attr get for
port id 0x1000000000007's attr index 0 attr id 8 failed with err -65536
While these are harmless, they create a considerable amount of background noise making it difficult to follow and trace out any real problems. There seems to be some level of support for obtaining speed and other attributes via ethtool in the python scripts so it looks like some work on this has been done already.
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