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Hello,Would you have an idea of what could cause MAC flapping in a loopless topology (the wiring has been checked).A Cisco switch is connected to a router of another brand (our supplier's). There is a data vlan and a voice vlan, only the telephone ex...

simc92 by Level 1
  • 902 Views
  • 3 replies
  • 0 Helpful votes

HiI am new to Cisco. I am an audio engineer. I am trying to get 2 trunk ports in the same switch. So when one cable fails, the other port automatically takes over the trunk duties. I have two switches. the 2 cables would go to the same switch.  How w...

I saw this topology in a network diagram somewhere and was wondering how this would work on a layer 2 level. Is this recommended? Would spanning tree automatically resolve it? I've had redundant links in real life scenarios but spanning tree would no...

hmc2500_0-1683655219080.png
hmc2500 by Level 1
  • 1475 Views
  • 10 replies
  • 0 Helpful votes

Having an issue getting AVB to work on the C9300-48UXM switch.  Specifically the PTP clock.Swapped out one of the "48UXM" models for a "48U" model and this works fine.  Problem is we still have 4 "48UXM" models that we need to get working with AVB.Wi...

LucidM by Level 1
  • 979 Views
  • 1 replies
  • 0 Helpful votes

We are busy with a migration form C9396PX to C93180YC-FX3The system is critical, and downtime is not an option to do a fast swap out of the equipment, so I need to do the migration gradually. Moving one SVI at a time as per picture below.I have creat...

Core Migration.jpg

Hi all,I have two 9200 switches stacked and would like to connect teamed nic ports of a server. I have the interfaces configured in LaCP and on the server side also I have teamed ports using LaCP . The issue is that one nic card is showing 1G speed w...

RMS3 by Level 1
  • 3870 Views
  • 16 replies
  • 0 Helpful votes

We currently have 1 VLAN that BIAMP and Crestron equipment live on and both sending Multicast traffic. All Multicast traffic that is in the 239.0.0.0 – 239.255.255.255 is traversing as expected however there are BIAMP and some Crestron endpoints that...

HelloWe purchased the IE-4000-8GT4G-E for the purpose of testing TSN capabilities. Now the documentation tells me I need the Central Network Controller software (CNC) for creating the TSN schedules needed for deterministic data transfer. But I cant s...

T.Mueller by Level 1
  • 3164 Views
  • 9 replies
  • 0 Helpful votes

There are two VLANs in network:VLAN 30: 192.168.1.0/24VLAN 40: 192.168.2.0/24A IGMP multicast group 224.0.0.251 is used for devices in both VLANs.I try to configure the router to enable the multicast routing, but it seems the router cannot join that ...