For the past two days, we have been having a really strange lag. There is a lag between our switch and our providers and they are directly linked via a Fiber SC line in the same datacenter. We usually get <1 ms lag, now it goes up to 60 MS sometimes. We have a Cisco Catalyst 3550 48 port SMI, our provider has a similar 3550...
We had about 20 Vlans in the switch along with routing 20 Vlans to other Layer2 switches. Recently we got our new block of IP to assign the servers so we are giving EACH server a subnet of 8 IP's. Therefore we created 400 VLANS along with routing 350 of them (meaning we now have 350 different gateway IP addresses on the 3550). Now we DO NOT know if this is related with the lag but kind of happened around the same times we started routing those Vlan's (nothing happened really when we just created without routing them).
We do not think they are related as that switch should be able to take more than that and in terms of bandwidth we are only at 100 MBPS.
We have no idea what can be causing this, but do you think what I wrote above with the vlans can create such a problem??
Please let me know ASAP