Show neighbour

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  • Updated 3 years ago
Hello,

I wonder that, in Enterasys Networks switch when we want to see ip adress and mac address we was typing "show neighbour" , but, in Extreme Networks switch when we type "show neighbour" we can not see the ip address of the switch. Therefore I have to look to arp table also. Is there any command that we can see all information easly like Enterasy Networks.

Thanks,
Best Regards
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Erhan YILDIZ

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Posted 3 years ago

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Daniel Flouret, Employee

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Erhan,

I assume you're talking about discovery protocols like edp or lldp.

In edp, if you use the detailed keyword you'll get a list of the vlans (and their ip addresses) available in the neighboring switches.

* lab1.sw2.1 # show edp ports all detailed

Port   Neighbor                       Neighbor-ID         Remote  Age    Num
                                                           Port         Vlans
=============================================================================
6      lab1.sw1                  00:00:00:01:30:df:01:01   1:6    15     3   
7      lab1.sw1                  00:00:00:01:30:df:01:01   1:7    15     3   
=============================================================================
* lab1.sw2.2 # show edp ports 6 detail
=============================================================================

Port 6: EDP is Enabled
Tx stats: sw-pdu-tx=11         vlan-pdu-tx=10         pdu-tx-err=0        
Rx stats: sw-pdu-rx=11         vlan-pdu-rx=11         pdu-rx-err=0        

Time of last transmit error: None
Time of last receive error:  None
Remote-System:        lab1.sw1                   Age = 27
Remote-ID:            00:00:00:01:30:df:01:01
Software version:     15.7.1.4
Remote-Port:          1:6
Port Type:         Ethernet
Auto Negotiation:    ON
Flow Control:        NONE
Duplex Speed:        Configured = AUTO        Actual = FULL   
Port Speed (MB):    Configured = AUTO        Actual = 100 Mbps
Remote-Vlans:
    core (20, 10.0.20.11)  Age = 27
    data (10, 10.0.10.11)  Age = 27
    iscc (100, 10.0.100.11)  Age = 27

=============================================================================
* lab1.sw2.3 #


On the other hand, if you are using lldp, you will need to configure the lldp ports to advertise management address information to its neighbors, as it is disabled by default.

configure lldp ports [all | port_list] [advertise | no-advertise] management-address

Then, if you request neighbor information with the detailed keyword it will display their management addresses.

* lab1.sw2.3 # show lldp neighbors detailed 

-----------------------------------------------------------------------------
LLDP Port 6 detected 1 neighbor
  Neighbor: 00:01:30:DF:01:01/6, age 25 seconds
    - Chassis ID type: MAC address (4)
      Chassis ID     : 00:01:30:DF:01:01
    - Port ID type: ifName (5)
      Port ID     : "6"
    - Time To Live: 120 seconds
    - Port Description: ""
    - System Name: "lab1.sw1"
    - System Description: "ExtremeXOS (Summit-PC) version 15.7.1.4 v1571b4 b\
                           y release-manager on Fri Feb 13 16:30:06 EST 2015"
    - System Capabilities : "Bridge, Router"
      Enabled Capabilities: "Bridge, Router"
    - Management Address Subtype: IPv4 (1)
      Management Address        : 172.16.56.11
      Interface Number Subtype  : ifIndex (2)
      Interface Number          : 1000006
      Object ID String          : "null"

-----------------------------------------------------------------------------
LLDP Port 7 detected 1 neighbor
  Neighbor: 00:01:30:DF:01:01/7, age 25 seconds
    - Chassis ID type: MAC address (4)
      Chassis ID     : 00:01:30:DF:01:01
    - Port ID type: ifName (5)
      Port ID     : "7"
    - Time To Live: 120 seconds
    - Port Description: ""
    - System Name: "lab1.sw1"
    - System Description: "ExtremeXOS (Summit-PC) version 15.7.1.4 v1571b4 b\
                           y release-manager on Fri Feb 13 16:30:06 EST 2015"
    - System Capabilities : "Bridge, Router"
      Enabled Capabilities: "Bridge, Router"
    - Management Address Subtype: IPv4 (1)
      Management Address        : 172.16.56.11
      Interface Number Subtype  : ifIndex (2)
      Interface Number          : 1000006
      Object ID String          : "null"

* lab1.sw2.4 #
If you see a MAC address instead of an IP address, then the mgmt vlan has no IP address configured.

Regards, Daniel