home

Software

NetworkingStorageSoftware
NetworkingStorageSoftware

Celestica Documentation Portal

Find your product documents here

Show Contents

thumbnailSoftware

ARP and NDP Commands

show ndp

Displays the IPv6 neighbor cache. If the L3 interface that the neighbor entry is learnt is on a VLAN, it also displays the Egress L2 port through which the neighbor MAC is reachable, if not a "-". If the neighbor is not reachable or invalid, the MAC is displayed as "-".

Syntaxshow ndp [ vrf <vrfname>] [ <interfacename> | <ipv6address> ]
Command modeEXEC
Parameters

  • vrfname – Name of the VRF. Accepts a string of maximum 32 characters.

  • interfacename– Name of the L3 Interface, such as Ethernet0, PortChannel10, Loopback2, Vlan100 or Management0.

  • ipv6address – IPv6 Neighbor Address.

Usage

  • <vrfname> is optional. If <vrfname> is not given, all the VRFs Neighbor Cache is retrieved.

  • <interfacename> is optional. If <interfacename> is not given, all Neighbor Cache entries learnt on L3 Interfaces is retrieved.

  • <ipv6address> is optional. By default, all Neighbors are retrieved if not specified.

Supported Releases1.1.0 or later
Click command show ndp -if <interface> [<ipv6address>]
Example 
sonic# show ndp vrf Vrf-101
Address                   MacAddress         Iface      Vlan  Status
------------------------  -----------------  -------  ------  --------
2023::b:2                 -                  -           101  FAILED
2023::6:2                 00:00:23:88:87:47  -           101  STALE
2023::1:2                 00:00:23:88:87:42  -           101  STALE
2023::8:2                 00:00:23:88:87:49  -           101  STALE
fe80::200:23ff:fe88:8738  00:00:23:88:87:38  -           101  STALE
2023::3:2                 00:00:23:88:87:44  -           101  STALE
2023::a:2                 00:00:23:88:87:4b  -           101  STALE
2023::5:2                 00:00:23:88:87:46  -           101  STALE
2023::7:2                 00:00:23:88:87:48  -           101  STALE
2023::2:2                 00:00:23:88:87:43  -           101  STALE
2023::9:2                 00:00:23:88:87:4a  -           101  STALE
2023::4:2                 00:00:23:88:87:45  -           101  STALE
Total number of entries 12

sonic# show ndp
Address                    MacAddress         Iface        Vlan    Status
-------------------------  -----------------  -----------  ------  ---------
fe80::e48:c6ff:fe85:ef5a   0c:48:c6:85:ef:5a  Management0  -       STALE
2023::b:2                  -                  -            101     FAILED
2023::6:2                  00:00:23:88:87:47  -            101     STALE
fe80::eab5:d0ff:fe82:894   e8:b5:d0:82:08:94  Management0  -       STALE
2023::1:2                  00:00:23:88:87:42  -            101     STALE
fe80::36ad:61ff:fef1:a4fa  34:ad:61:f1:a4:fa  Management0  -       STALE
2023::8:2                  00:00:23:88:87:49  -            101     STALE
fe80::200:23ff:fe88:8738   00:00:23:88:87:38  -            101     STALE
2023::3:2                  00:00:23:88:87:44  -            101     STALE
fe80::eab5:d0ff:fe81:ec94  e8:b5:d0:81:ec:94  Management0  -       REACHABLE
2010::2                    -                  Ethernet5    -       FAILED
fe80::eab5:d0ff:fe81:b694  e8:b5:d0:81:b6:94  Management0  -       REACHABLE
2023::a:2                  00:00:23:88:87:4b  -            101     STALE
2023::5:2                  00:00:23:88:87:46  -            101     STALE
2023::7:2                  00:00:23:88:87:48  -            101     STALE
2023::2:2                  00:00:23:88:87:43  -            101     STALE
2023::9:2                  00:00:23:88:87:4a  -            101     STALE
fe80::36ad:61ff:fef1:a56c  34:ad:61:f1:a5:6c  Ethernet5    -       STALE
2023::4:2                  00:00:23:88:87:45  -            101     STALE
fe80::eab5:d0ff:fe81:f794  e8:b5:d0:81:f7:94  Management0  -       STALE
Total number of entries 20
sonic#
sonic# show ndp Management0
Address                    MacAddress         Iface        Vlan    Status
-------------------------  -----------------  -----------  ------  ---------
fe80::e48:c6ff:fe85:ef5a   0c:48:c6:85:ef:5a  Management0  -       STALE
fe80::eab5:d0ff:fe82:894   e8:b5:d0:82:08:94  Management0  -       STALE
fe80::36ad:61ff:fef1:a4fa  34:ad:61:f1:a4:fa  Management0  -       STALE
fe80::eab5:d0ff:fe81:ec94  e8:b5:d0:81:ec:94  Management0  -       REACHABLE
fe80::eab5:d0ff:fe81:b694  e8:b5:d0:81:b6:94  Management0  -       REACHABLE
fe80::eab5:d0ff:fe81:f794  e8:b5:d0:81:f7:94  Management0  -       STALE
Total number of entries 6
sonic#
sonic# show ndp 2023::a:2
Address    MacAddress         Iface      Vlan  Status
---------  -----------------  -------  ------  --------
2023::a:2  00:00:23:88:87:4b  -           101  STALE
Total number of entries 1

Last updated: February 28, 2025