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Latest post 11-12-2016 9:49 AM by peety. 3 replies.
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  • 11-10-2016 2:09 PM

    SVI interface as UP/DOWN

    I've created an SVI for Management purposes only, so I haven't assigned any int to this SVI,
    or set it as an access or Trunk mode.

    How can I get the SVI as UP/UP?

    My IOS won't allow me use the "no autostate" command against the SVI interface.

    **  See the below IOS and model

    sh ver
    Cisco IOS Software, C3750 Software (C3750-IPBASEK9-M), Version 12.2(50)SE5, RELEASE SOFTWARE (fc1)
    Technical Support: http://www.cisco.com/techsupport
    C
    System image file is "flash:/c3750-ipbasek9-mz.122-50.SE5/c3750-ipbasek9-mz.122-50.SE5.bin"

    **  See the status of the SVI int

    #sh int vlan 5
    Vlan5 is up, line protocol is down
      Hardware is EtherSVI, address is 0cd9.966d.3245 (bia 0cd9.966d.3245)
      Description: ### WiFi Management Vlan ###
      Internet address is 10.x.x.129/26
      MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
         reliability 255/255, txload 1/255, rxload 0/255
      Encapsulation ARPA, loopback not set
      Keepalive not supported
      ARP type: ARPA, ARP Timeout 04:00:00
      Last input never, output 06:55:24, output hang never
      Last clearing of "show interface" counters never
      Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
      Queueing strategy: fifo
      Output queue: 0/40 (size/max)
      5 minute input rate 0 bits/sec, 0 packets/sec
      5 minute output rate 0 bits/sec, 0 packets/sec
         0 packets input, 0 bytes, 0 no buffer
         Received 0 broadcasts (0 IP multicasts)
         0 runts, 0 giants, 0 throttles
         0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
         3 packets output, 192 bytes, 0 underruns
         0 output errors, 0 interface resets
         0 output buffer failures, 0 output buffers swapped out

    **  I've created the relevant vlan, see the below:

    sh vlan

    VLAN Name                             Status    Ports
    ---- -------------------------------- --------- -------------------------------

    5    WIFI_MANAGEMENT                  active

    **  See the SVI L3

    interface Vlan5
     description ### WiFi Management Vlan ###
     ip address 10.x.x.129 255.255.255.192

     

     

    Thanks

    Mark

     

    • Post Points: 50
  • 11-11-2016 3:35 PM In reply to

    • tmanito
    • Top 75 Contributor
    • Joined on 08-11-2012
    • Philippines
    • Elite
    • Points 4,360

    Re: SVI interface as UP/DOWN

    http://packetlife.net/blog/2009/nov/9/svi-autostate/

    This is a good reference

    • Post Points: 5
  • 11-12-2016 8:47 AM In reply to

    Re: SVI interface as UP/DOWN

    Hello Mark,

    no autostate is available only for routers, as far as I know.

    For your 3750, you will need to have an interface up on the respective VLAN.

     

    Cheers!

     

    Fabrício

    • Post Points: 5
  • 11-12-2016 9:49 AM In reply to

    • peety
    • Top 25 Contributor
    • Joined on 02-22-2011
    • Redmond, WA, USA
    • Elite
    • Points 19,700

    Re: SVI interface as UP/DOWN

    The really simple test I've taught others is to do 'sh spann vlan XX' and look at the output: if 0 ports are FWD, expect up/down. If >0 ports are FWD, expect up/up.

    CCIE R&S #34583

    Now based in Redmond, WA

    • Post Points: 5
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