[YMCS/YDMP Free Trial Program]Yealink would like to offer Free Trial Program of Yealink device management service for our current eligible customers. You can see the details below.
https://www.yealink.com/ydmp-freetrial-2020


Post Reply 
 
Thread Rating:
  • 0 Votes - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
T23G sending 0x5c packets once a minute
Author Message
DavidAUM Offline
Junior Member
**

Posts: 8
Joined: Apr 2013
Reputation: 0
Post: #1
T23G sending 0x5c packets once a minute
Hello,

My T23G phone is sending out the exact same packet once every minute:

Code:
Ethernet Header
Ether Type: 0x5c(0x5c), Src=[80:5e:c0:44:f6:7e], Dst=[01:00:0c:cc:cc:cc]

Hex Dump:
01000ccc cccc805e c044f67e 005caaaa 0300000c 200002b4 *.......^.D.~.\...... ...*
6c7c0001 00145432 33473830 35454330 34344636 37450002 *l|....T23G805EC044F67E..*
00110000 00010101 cc00040a 0a0c6c00 03000c57 414e2050 *..............l....WAN P*
4f525400 04000800 00009000 05000400 06000854 32334700 *ORT................T23G.*
0b000501 00100006 0ed8                                *..........              *

It looked like multicast to me, but even with the intercom features disabled, the packets persist.

Thoughts?

Thanks,

David
07-29-2019 07:18 PM
Find all posts by this user    like0    dislike0 Quote this message in a reply
Clan_Yealink Offline
Junior Member
**

Posts: 6
Joined: Mar 2019
Reputation: 0
Post: #2
RE: T23G sending 0x5c packets once a minute
(07-29-2019 07:18 PM)DavidAUM Wrote:  Hello,

My T23G phone is sending out the exact same packet once every minute:

Code:
Ethernet Header
Ether Type: 0x5c(0x5c), Src=[80:5e:c0:44:f6:7e], Dst=[01:00:0c:cc:cc:cc]

Hex Dump:
01000ccc cccc805e c044f67e 005caaaa 0300000c 200002b4 *.......^.D.~.\...... ...*
6c7c0001 00145432 33473830 35454330 34344636 37450002 *l|....T23G805EC044F67E..*
00110000 00010101 cc00040a 0a0c6c00 03000c57 414e2050 *..............l....WAN P*
4f525400 04000800 00009000 05000400 06000854 32334700 *ORT................T23G.*
0b000501 00100006 0ed8                                *..........              *

It looked like multicast to me, but even with the intercom features disabled, the packets persist.

Thoughts?

Thanks,

David
Hi David,

This is Clan from Yealink Support Team, nice to know you here!

From your description, I can see that these messages may be sent by LLDP and CDP. Yealink SIP Phone support LLDP and CDP functions, and the default state is on. When LLDP/CDP feature is enabled on the phones, the phones periodically advertise their own information to the directly connected LLDP/CDP-enabled switch.

BTW, Will sending these messages have any impact on you?

Best Regards!
Clan
08-01-2019 08:55 AM
Find all posts by this user    like0    dislike0 Quote this message in a reply
DavidAUM Offline
Junior Member
**

Posts: 8
Joined: Apr 2013
Reputation: 0
Post: #3
RE: T23G sending 0x5c packets once a minute
CDP it is! Thank you.

The packets had no negative impact on my network. They were just new to me as the other Yealink phones on my network were older and, now I see, did not support CDP. New and unexpected packets make me curious.

Thank you for satisfying that curiosity!

David
08-01-2019 06:12 PM
Find all posts by this user    like0    dislike0 Quote this message in a reply
Post Reply 


Possibly Related Threads...
Thread: Author Replies: Views: Last Post
  T23G does not respond to network aciacci 1 1,760 05-07-2021 12:11 AM
Last Post: complex1
  Forwarding - Action URI - T23G matiasarw 0 1,497 03-14-2021 08:13 AM
Last Post: matiasarw
  how to connect yealink T23G to mikrotik openvpn server m.taghavi 4 5,545 10-11-2020 11:31 AM
Last Post: bozko
  T23G Unable to Obtain IP Address xBrito 6 7,817 05-21-2020 01:05 PM
Last Post: jolouis
  Used T23G, can't factory reset, can't update MonkeySeeMonkeyDo 3 5,359 05-19-2020 07:19 PM
Last Post: Yisroel_MongoTEL
Smile Can a T29G Config.bin file be uploaded into a T23G Red Stone Telecom 0 2,181 03-29-2020 08:35 PM
Last Post: Red Stone Telecom
  T23G Unable to obtain IP after upgrade Duncan 2 4,050 12-31-2019 10:58 PM
Last Post: Duncan
  T23G Network unavailable obtaining ip address james king 4 13,093 12-04-2019 09:46 AM
Last Post: nn123nn
  T23G .bin and .rfs ? rmeunier 5 10,582 11-14-2019 01:57 PM
Last Post: Evan_Yealink
  T23G Unable to Transfer Calls Dorothea 2 5,560 03-30-2018 04:53 PM
Last Post: Dorothea

Forum Jump:


User(s) browsing this thread: 1 Guest(s)

Contact Us   Yealink   Return to Top   Return to Content   Lite (Archive) Mode   RSS Syndication