I have a 1544f switch that these two switches are plugging into with fiber directly to each location.
I have two new 1531P switches and I configured both at my desk and the worked fine and were responsive when I was plugged into Ethernet. When I took it onsite and plugged it into the sfp I was able to get the clients on the network, but when I got back to my desk I could not telnet or HTTP to the device. I switched out module, the fiber pair and even the port in our 1544f with no luck. I took it down and brought it back to the office. If I plug into another switch with the SFP port, I get normal CPU utilization. The second I plug it into the 1544f, I get high CPU utilization. Both the 1531p and the 1544f are on OS version R11.12.0. I thought it was software related on the 1531p so I took it back to factory firmware with some change. Now I can ping the device but REALLY bad response times (in the hundreds to thousands ms), but I the high CPU remains.
It's a pretty basic config and I've attached the config of one of the new switches as well as the cpu utilization. Any help would get great. Thanks!
FYI in case anyone else runs into this issue, I ended up calling support. While at first they couldn't pin point it, after sending some i nterface logs on the uplink port they were setting a heavy amount of multicast traffic. We have a lot of IP cameras on the network so by enabling IGMP Snooping on the vlan interfaces, the switch calmed down. I'm not sure as we have 5 1534p and 2 1544f and neither of them have IGMP snooping and performed fine. My guess is the 1531p has different hardware and can't handle the amount of traffic or the 1534 and 1544 while they don't have options for IGMP snooping, it's possible it's enabled just not configurable. Either way, I'm all fixed. Here was the command I ran at the configure terminal:
FYI in case anyone else runs into this issue, I ended up calling support. While at first they couldn't pin point it, after sending some i nterface logs on the uplink port they were setting a heavy amount of multicast traffic. We have a lot of IP cameras on the network so by enabling IGMP Snooping on the vlan interfaces, the switch calmed down. I'm not sure as we have 5 1534p and 2 1544f and neither of them have IGMP snooping and performed fine. My guess is the 1531p has different hardware and can't handle the amount of traffic or the 1534 and 1544 while they don't have options for IGMP snooping, it's possible it's enabled just not configurable. Either way, I'm all fixed. Here was the command I ran at the configure terminal:
