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bvn63
Beginner

Signal problem between switch 2960G and SG95D-08 (Unmanaged Switch)

Good day,

I have problem with configuration as below:

(a) Switch 2960G (Giga 0/46) ---(3 pair)--- PC << Worked

(b) Switch 2960G (Giga 0/46) ---(3 pair)--- Linksys SE2800 (8 port Unmanaged) ---(3 pair)--- PC << Worked

(c) Switch 2960G (Giga 0/46) ---(3 pair)--- Cisco SG95D-08 (8 port Unmanaged) ---(3 pair)--- PC << Not Worked

(d) Switch 2960G (Giga 0/46) ---(4 pair)--- Cisco SG95D-08 (8 port Unmanaged) ---(4 pair)--- PC << Worked

Switch Configuration
interface GigabitEthernet0/46
switchport access vlan 4

I use 3 pair (orange white,orange;green white,blue;blue white,green) for Ethernet and 1 pair (brown white,brown) for telephone.

In the case (a) (b):

+ PC could connect to internet.

In the case (c):

+ Doesn't have signal between Switch 2960G and Cisco SG95D-08 although I change another cable (3 pair also)

++ Did not have any error on Switch 2906G log
++ GigabitEthernet0/46 is down, line protocol is down (notconnect)

+ Worked if I change normal cable (the case (d))

Anyone can help me explain why Cisco SG95D-08 not worked in the case (c).

I really appreciate your help.

Thank you.

Sang

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