switch to switch: Is it important to use cross over cables?

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i have many switches to interconnect,does it required crossover cables?
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Sikander Shah

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Posted 2 years ago

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Senguttuvan, Arun, Employee

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By default auto polarity is ON, you could use straight through cables itself for connecting the switches. 

You might need to use cross over cables only when auto polarity is turned off. 
(Edited)
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MANAS BEHERA

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Sikander, 

it not necessary.  you can you straight cable.
Extreme switch support auto-polarity and it on by default which help to automatically detect the other end link through straight cable.


Regards,
Manas Ranjan
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Sikander Shah

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how to check that auto polarity is off or on?
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Senguttuvan, Arun, Employee

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show ports <port#> information detail will show if polarity is enabled or not for the port
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Farookh shaikh

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try this command show port information detail 
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MANAS BEHERA

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Hello Sikander, 

following is the command

Slot-1 16TH_FLR_SOUTH.5 # show ports 1:1 information detail
        Virtual-router: VR-Default
        Type:           UTP
        Random Early drop:      Unsupported
        Admin state:    Enabled with  auto-speed sensing  auto-duplex
        Link State:     Ready
        Link Ups:       0        Last: --
        Link Downs:     0        Last: --
        EDP:            Disabled

        EEE:            Disabled
        ELSM:           Disabled
        Ethernet OAM:           Disabled
        Learning:       Enabled
        Unicast Flooding:       Enabled
        Multicast Flooding:     Enabled
        Broadcast Flooding:     Enabled
        Jumbo:          Disabled
        Flow Control:   Rx-Pause: Enabled       Tx-Pause: Disabled
        Priority Flow Control: Disabled
        Reflective Relay:       Disabled
        Link up/down SNMP trap filter setting:  Enabled
        Egress Port Rate:       No-limit
        Broadcast Rate:         No-limit
        Multicast Rate:         No-limit
        Unknown Dest Mac Rate:  No-limit
        QoS Profile:    None configured
        Ingress Rate Shaping :          Unsupported
        Ingress IPTOS Examination:      Disabled
        Ingress 802.1p Examination:     Enabled
        Ingress 802.1p Inner Exam:      Disabled
        Egress IPTOS Replacement:       Disabled
        Egress 802.1p Replacement:      Disabled
        NetLogin:                       Disabled
        NetLogin port mode:             Port based VLANs
        Smart redundancy:               Enabled
        Software redundant port:        Disabled
        IPFIX:   Disabled               Metering:  Ingress, All Packets, All Traffic
                IPv4 Flow Key Mask:     SIP: 255.255.255.255            DIP: 255.255.255.255
                IPv6 Flow Key Mask:     SIP: ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff
                                        DIP: ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff

        auto-polarity:                  Enabled
        Shared packet buffer:           default
        VMAN CEP egress filtering:      Disabled
        Isolation:                      Off
        PTP Configured:                 Disabled
        Time-Stamping Mode:             None
        Synchronous Ethernet:           Disabled
        Dynamic VLAN Uplink:            Disabled
        VM Tracking Dynamic VLANs:      Disabled


Regards, 
Manas Ranjan
(Edited)