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Network Slowness

tecnetpro
Occasional Visitor

Network Slowness

Hi I have a network with S7900E as the core switch in the data center and the 3 5500 switches in the floors.

2 5500G-EI 48 port POE switches and 1 5500-EI 48 power switches.2 5500G's are connected by XRN and other switch uplinked to 5500G's with 2 1Gig connection.5500 G have a 10G Fibre module connected to the core in each floor and also a 1G to the core as back.I have vlans for each floor and the vlan interface is in the core switch.

Now i have a problem in one of the floors,the network is **** slow but in other floors it ok.I could not find the reason.Can someone suggest some possible test i can do which i have missed out and also i found out that in display diag the CPU have gone above 90% which is not normal.
2 REPLIES
rbaffert
Advisor

Re: Network Slowness

Hi,



If I understand well, your network is like that :



S7900E ===10Gig=== 2x5500G XRN Stack == 2 x 1Gig === 5500



Is that right ?



Where exactly is your speed problem ? are your clients 1000BASE-T ? do you have LACP enabled ? dynamic/static/manual ?



Romain BAFFERT

Cabling Partners
Romain BAFFERT

Cabling Partners
sm-noc
Advisor

Re: Network Slowness

try to isolate ,

 

disconnect all the uplink firts, then connect one by one, then check the cpu again,