> > The two switches talk just fine between the two devices on > VLAN 1. >
Yes, because the default / admin VLAN 1 is automagicaly extended across switches for obvious reasons. > But VLAN 2 will not talk. VLANs are broadcast domains, and with the exception of the default/admin VLAN 1, unless you extend the vlan broadcast domain intentionally, vlan traffic stays local to the switch. > The interesting thing is that if Iunplug the SFP transceiver in port 49 > (associated with VLAN 1) then VLAN 2 will start to talk to the other switch > over the SFP device in port 50. > This is the Spanning Tree Protocol unlblockiing and finding a new route after a link failure. > I am assuming configuration somewhere but not sure where. > Correct assumption. You need to configure a vlan trunk for VLAN 2 to traverse the fiber links between the 2 switches, https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3850/software/release/3se/vlan/configuration_guide/b_vlan_3se_3850_cg/b_vlan_3se_3850_cg_chapter_0110.pdf _______________________________________________ PLUG: https://pdxlinux.org PLUG mailing list [email protected] http://lists.pdxlinux.org/mailman/listinfo/plug
