network device-discovery show -protocol cdp - no entries

Brian_McCullough — Wed, 03 Sep 2025 22:01:19 GMT

I am re-installing (wipeconfig, new software first, yada, yada) an AFF-A300 nodes and hit something new. I exit out of the setup at the (join / create) and turn on cdp (system node run -node localhost -command options cdpd.enable on) to validate as-built cabling matches expected/design. The two AFF A300 nodes are showing lldp entries from three different cisco devices, but not any cdp entries for any device. AFF-A300 running 9.14.1P5 (chosen to match FAS8200 cluster it will be eventually joining.) The destination cluster pair of FAS8200s are connected to the c2921(light out management) and N5K data switches, and are receiving/sending CDP advertisements without issues. So, all roads point to AFFs/ONATP as culprit. Yes, each AFF can ping the cluster LIFs of the other node, both nodes rebooted.

It may be that nodes must be fully baked into a cluster before cdp actually works?
It may be something with this version and patch of ONTAP as fresh install, so OS change?

No technical case opened, yet, sharing the love first.
Will update when solved.

[Names and MAC Addr changed to protect the innocent until proven guilty]

::> network device-discovery show -fields protocol

node protocol port discovered-device interface

--------- -------- ---- ---------------------------------------- ---------

localhost lldp e0M "c2921 (94:d4:69:00:00:00)" Fa0/7

localhost lldp e0a "N9K-C9336C-FX2-01 (7c:ad:00:00:00:00)" Ethernet1/1/2

localhost lldp e0b "N9K-C9336C-FX2-02 (a0:b4:00:00:00:00)" Ethernet1/1/2

localhost lldp e0e "N5K-C5672UP-01 (00:2a:6a:00:00:00)" Eth1/13

localhost lldp e0f "N5K-C5672UP-02 (8c:60:4f:00:00:00)" Eth1/12

localhost lldp e0g "N5K-C5672UP-02 (8c:60:4f:00:00:00)" Eth1/14

localhost lldp e0h "N5K-C5672UP-01 (00:2a:6a:00:00:00)" Eth1/14

localhost lldp e1a "N9K-C9336C-FX2-02 (a0:b4:00:00:00:00)" Ethernet1/2/2

localhost lldp e1b "N9K-C9336C-FX2-01 (7c:ad:00:00:00:00)" Ethernet1/2/2

::>

::> system node run -node localhost -command options cdpd

cdpd.enable on (value might be overwritten in takeover)

cdpd.holdtime 180 (value might be overwritten in takeover)

cdpd.interval 60 (value might be overwritten in takeover)

::> system node run -node localhost -command options lldp

lldp.enable on (value might be overwritten in takeover)

lldp.xmit.hold 4 (value might be overwritten in takeover)

lldp.xmit.interval 30 (value might be overwritten in takeover)

::>

::> system node run -node localhost -command cdpd show-stats

RECEIVE

Packets: 0 | Csum Errors: 0 | Unsupported Vers: 0

Invalid length: 0 | Malformed: 0 | Mem alloc fails: 0

Missing TLVs: 0 | Cache overflow: 0 | Received Own Adv: 0

Other errors: 0 | Unknown TLV: 0 | Ejected entries: 0

Eject failed: 0 | Bad Value: 0 | Hidden Port Drop: 0

TRANSMIT

Packets: 0 | Xmit fails: 0 | No hostname: 0

Packet truncated: 0 | Truncate fails: 0 | Mem alloc fails: 0

Other errors: 0

OTHER

Init failures: 0

::> system node run -node localhost -command lldp stats

RECEIVE

Total frames: 6115 | Accepted frames: 6115 | Total drops: 0

TRANSMIT

Total frames: 3331 | Total failures: 0

OTHER

Stored entries: 9

::>

-----

N9K-C9336C-FX2-01# sh cdp interface Eth1/1/1

Ethernet1/1/1 is up

CDP enabled globally

CDP enabled on interface

Refresh time is 5 seconds

Hold time is 180 seconds

N9K-C9336C-FX2-01# sh cdp neighbors interface Eth1/1/1

Note: CDP Neighbor entry not found

N9K-C9336C-FX2-01#

N9K-C9336C-FX2-01# sh lldp neigh interface Eth1/1/1

Capability codes:

(R) Router, (B) Bridge, (T) Telephone, (C) DOCSIS Cable Device

(W) WLAN Access Point, (P) Repeater, (S) Station, (O) Other

Device ID Local Intf Hold-time Capability Port ID

00a0.0000.0000 Eth1/1/1 121 S e0a

Total entries displayed: 1

N9K-C9336C-FX2-01#

----

Re: network device-discovery show -protocol cdp - no entries

Brian_McCullough — Wed, 03 Sep 2025 23:38:28 GMT

Ok, that is solved, CDP is not fully enabled until node has joined a cluster. So, I miss-remembered checking cdp for cabling before initial/basic cluster setup. Ok, now to wipe and re-init cluster. Thanks for tuning in.

test::> network device-discovery show -fields protocol -node test-02
node protocol port discovered-device interface
------- -------- ---- ---------------------------------- -------------
test-02 cdp e0a N9K-C9336C-FX2-01(SN01) Ethernet1/1/2
test-02 cdp e0b N9K-C9336C-FX2-02(SN02) Ethernet1/1/2
test-02 cdp e0e N5K-C5672UP-01(SN03) Ethernet1/13
test-02 cdp e0f N5K-C5672UP-02(SN04) Ethernet1/12
test-02 cdp e0g N5K-C5672UP-01(SN03) Ethernet1/14
test-02 cdp e0h N5K-C5672UP-02(SN04) Ethernet1/14
test-02 cdp e1a N9K-C9336C-FX2-02(SN02) Ethernet1/2/2
test-02 cdp e1b N9K-C9336C-FX2-01(SN01) Ethernet1/2/2
test-02 lldp e0M "c2921 (94:d4:69:00:00:00)" Fa0/7
test-02 lldp e0a "N9K-C9336C-FX2-01 (7c:ad:00:00:00:00)" Ethernet1/1/2
test-02 lldp e0b "N9K-C9336C-FX2-02 (a0:b4:00:00:00:00)" Ethernet1/1/2
test-02 lldp e0e "N5K-C5672UP-01 (00:2a:6a:00:00:00)" Eth1/13
test-02 lldp e0f "N5K-C5672UP-02 (8c:60:4f:00:00:00)" Eth1/12
test-02 lldp e0g "N5K-C5672UP-01 (00:2a:6a:00:00:00)" Eth1/14
test-02 lldp e0h "N5K-C5672UP-02 (8c:60:4f:00:00:00)" Eth1/14
test-02 lldp e1a "N9K-C9336C-FX2-02 (a0:b4:00:00:00:00)" Ethernet1/2/2
test-02 lldp e1b "N9K-C9336C-FX2-01 (7c:ad:00:00:00:00)" Ethernet1/2/2

17 entries were displayed.

test::>

topic Re: network device-discovery show -protocol cdp - no entries in Network and Storage Protocols

network device-discovery show -protocol cdp - no entries

Re: network device-discovery show -protocol cdp - no entries