The phone rings, it’s a colleague, a DBA, dangerous people!
Listen, – he says – we have a weird problem. I have started a 600GB backup on Sunday night, it’s Tuesday morning, the backup is still at around 30%. There is one of your network guys here with me, please talk to him, DBA out!
Ok – I said – Bob, (in IT there is always a Bob and an Alice, an old habit) what’s the situation from the networking perspective?
Not so good, – he answers – since Monday we have been experiencing some random problems with no apparent correlation, some slowdowns but not total cut-offs. Ah, and another thing, the Catalyst 3750-X in the stack have been experiencing horrible ssh delays when we connect to them.
Hmmm, one more question, did you apply some kind of a dirty configuration to those switches?
No no, nothing relevant, on Saturday, during the scheduled maintenance, we only added some ACLs, but we have checked them, they are working perfectly, so the problem has to be somewhere else, for sure!
Hoho Bob, I truly believe it would be wise for you to have a look at the related post here. Let me know if it helped to solve the issue.