HP Networking – Tracing Networks and Locating IP addresses

 

After not touching one for a couple of years, I was back on HP switches recently, and I had to map out a clients switches. Now I could have used some software, but they didn't have SNMP enabled so, I had to 're acquaint' myself with LLDP.

For a basic LLDP View of attached devices.

HP-Switch-1# show lldp info remote-device

 LLDP Remote Devices Information

  LocalPort | ChassisId                 PortId PortDescr SysName
  --------- + ------------------------- ------ --------- ----------------------
  10        | Cisco1.petenetlive.com       Gig...
  10        | 00 1c f6 c8 55 8f         || ... Gigabi... Cisco1.petenetlive.com
  13        | Cisco1.petenetlive.com       Gig...
  13        | 00 1c f6 c8 55 92         || ... Gigabi... Cisco1.petenetlive.com
  23        | c0 91 34 dd 3b c0         23     23        HP-Switch-2
  24        | c0 91 34 dd 3b c0         24     24        HP-Switch-2

For a More Detailed LLDP View of attached devices.

Note: This command will NOT show up in the help menu!

HP-Switch-1# show lldp info remote all

 LLDP Remote Device Information Detail

  Local Port   : 10
  ChassisType  : local
  ChassisId    : Cisco1.petenetlive.com
  PortType     : local
  PortId       : GigabitEthernet0/15
  SysName      :
  System Descr : Cisco IOS Software, C2960 Software (C2960-LANBASE-M), Ver...
  PortDescr    :

  System Capabilities Supported  : bridge
  System Capabilities Enabled    : bridge

  Remote Management Address
     Type    : ipv4
     Address : 111.222.111.222

------------------------------------------------------------------------------
  Local Port   : 10
  ChassisType  : mac-address
  ChassisId    : 00 1c f6 c8 55 8f
  PortType     : inte...
  PortId       : || PeteNet || 10Mb ||...
  SysName      : Cisco1.petenetlive.com
  System Descr : Cisco IOS Software, C2960 Software (C2960-LANBASE-M), Ver...
  PortDescr    : GigabitEthernet0/15

  System Capabilities Supported  : bridge, router
  System Capabilities Enabled    :

  Remote Management Address
     Type    : ipv4
     Address : 111.222.111.222

------------------------------------------------------------------------------
  Local Port   : 13
  ChassisType  : local
  ChassisId    : Cisco1.petenetlive.com
  PortType     : local
  PortId       : GigabitEthernet0/18
  SysName      :
  System Descr : Cisco IOS Software, C2960 Software (C2960-LANBASE-M), Ver...
  PortDescr    :

  System Capabilities Supported  : bridge
  System Capabilities Enabled    : bridge

  Remote Management Address
     Type    : ipv4
     Address : 111.222.111.222

------------------------------------------------------------------------------
  Local Port   : 13
  ChassisType  : mac-address
  ChassisId    : 00 1c f6 c8 55 92
  PortType     : inte...
  PortId       : || PeteNet || Previou...
  SysName      : Cisco1.petenetlive.com
  System Descr : Cisco IOS Software, C2960 Software (C2960-LANBASE-M), Ver...
  PortDescr    : GigabitEthernet0/18

  System Capabilities Supported  : bridge, router
  System Capabilities Enabled    :

  Remote Management Address
     Type    : ipv4
     Address : 111.222.111.222

------------------------------------------------------------------------------
  Local Port   : 23
  ChassisType  : mac-address
  ChassisId    : c0 91 34 dd 3b c0
  PortType     : local
  PortId       : 23
  SysName      : HP-Switch-2
  System Descr : HP J9145A 2910al-24G Switch, revision W.15.13.0014, ROM W...
  PortDescr    : 23

  System Capabilities Supported  : bridge, router
  System Capabilities Enabled    : bridge, router

  Remote Management Address
     Type    : ipv4
     Address : 192.168.1.221

  Poe Plus Information Detail

    Poe Device Type         : Type2 PSE
    Power Source            : Unknown
    Power Priority          : Unknown
    Requested Power Value   : 0 Watts
    Actual Power Value      : 0 Watts

------------------------------------------------------------------------------
  Local Port   : 24
  ChassisType  : mac-address
  ChassisId    : c0 91 34 dd 3b c0
  PortType     : local
  PortId       : 24
  SysName      : HP-Switch-2
  System Descr : HP J9145A 2910al-24G Switch, revision W.15.13.0014, ROM W...
  PortDescr    : 24

  System Capabilities Supported  : bridge, router
  System Capabilities Enabled    : bridge, router

  Remote Management Address
     Type    : ipv4
     Address : 192.168.1.221

  Poe Plus Information Detail

    Poe Device Type         : Type2 PSE
    Power Source            : Unknown
    Power Priority          : Unknown
    Requested Power Value   : 0 Watts
    Actual Power Value      : 0 Watts

To find what Port an IP address is on

First ping the IP address, to make sure that the switch has the MAC address you are looking at, in its ARP cache.

 
HP-Switch-1# ping 192.168.251.2
192.168.251.2 is alive, time = 3 ms

Then look for it in the ARP cache;

HP-Switch-1# show arp

 IP ARP table

  IP Address       MAC Address       Type    Port
  ---------------  ----------------- ------- ----
  192.168.251.1    e8b748-c757b0     dynamic 13
  192.168.251.2    005056-a61c1c     dynamic 5  << It’s on port 5
  192.168.251.5    005056-a606d9     dynamic 7

Or if you already know its MAC address;

HP-Switch-1# show mac-address 005056-a61c1c

 Status and Counters - Address Table - 005056-a61c1c

 Port
 -------
 5

Author: PeteLong

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