Extreme Networks

The first time we inserted 100G-SR4BD-QSFP100M transceivers into two 7520-48YE-8CE switches, we did not get a link. The output of the command "show pluggable-optical-modules detail" indicated that neither switch was applying any transmit power. Looki...

Hi, I have noticed a problem regarding IP multicast, IGMP and VXLAN on EXOS: IGMP packets are not forwarded when they enter the switch via VXLAN VTEP. All other tested multicast packets (VRRP, OSPF, custom UDP traffic for both the local network cont...

Hi, I have recently seen an old Enterasys C2 switch logging the message: UPN[113003896]: broad_etsys_policy.c(1052) 52007 %% portVlan 0, ppid 7, uvlan 0 upid 0 Does anyone know what this actually means? The switch is really old, but perhaps someone...

Hi, recently I have seen some Apple devices triggering the HostDos icmpSize check (set to the default size limit of 1024) on an S-Series: Event(Notice) for - HostDoS[6] Attack ( icmpSize ) detected on vlan.0. InPort() LEN(1398) DA() SA() C-TAG(810...

Hi all, what happens if an S-Series switch receives tagged a RSTP BPDU on a port? Standard conforming spanning tree BPDUs are never tagged with a VLAN ID, but some devices add a .1Q tag with VLAN ID to otherwise standard BPDUs (e.g. Alcatel 1x1 mod...