Switches: 2960G & C9300L
Use: Carrying audio
Tried connecting a cisco 2960g to a Cisco C9300L via SFP ports. The 9300L kills the audio within 3 seconds for the two studios that are on that switch when I plug the SFP adapter into it. I know the 2960g of course is old and I am using a SFP adapter(it's old too) from redwave for the SFP port on the 9300. We ran some basic commands to prepare the 2960 such as: no flood, igmp snooping and QOS. But maybe it's just as simple as the SFP adapter...though the logs didn't show anything abnormal for the SFP plug in. As you'll see the interface came up and went down rather quickly. That was me unplugging it when the audio went down in the 2 studios already piping audio through the 9300 switch:
*Jul 21 00:26:00.014: %PLATFORM_PM-6-MODULE_INSERTED: SFP module inserted with interface name Gi1/1/2
*Jul 21 00:26:05.269: %LINK-3-UPDOWN: Interface GigabitEthernet1/1/2, changed state to up
*Jul 21 00:26:06.269: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/1/2, changed state to up
*Jul 21 00:26:06.695: %PLATFORM_PM-6-MODULE_REMOVED: SFP module with interface name Gi1/1/2 removed
*Jul 21 00:26:07.740: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/1/2, changed state to down
*Jul 21 00:26:08.742: %LINK-3-UPDOWN: Interface GigabitEthernet1/1/2, changed state to down
*Jul 21 00:27:34.381: %WEBSERVER-5-SESS_TIMEOUT: Switch 1 Session timeout from host 192.168.87.20 by user 'cisco' using crypto cipher 'TLS_AES_256_GCM_SHA384'
