Wireshark mailing list archives
Re: LLDP encoding
From: Anders Broman <anders.broman () ericsson com>
Date: Tue, 13 Jun 2017 08:46:16 +0000
From: Wireshark-users [mailto:wireshark-users-bounces () wireshark org] On Behalf Of sothy shan Sent: den 13 juni 2017 10:03 To: Community support list for Wireshark <wireshark-users () wireshark org> Subject: Re: [Wireshark-users] LLDP encoding On Tue, Jun 13, 2017 at 8:41 AM, Jaap Keuter <jaap.keuter () xs4all nl<mailto:jaap.keuter () xs4all nl>> wrote: On 13-06-17 08:28, sothy shan wrote:
Hi, I am just checking LLDP in mininet with OVS using wireshark. My question some data are encoding differently. I wish to know why it is? For example, chaissisId type is 1. But it is shown as 02 in your image. https://wiki.wireshark.org/LinkLayerDiscoveryProtocol?action=AttachFile&do=view&target=LLDP.png Same thing I observed in my testing also. do you have any specific encodign technique for LLDP data. Thanks for your explanation. Best regards Sothy
Hi, Be aware that the TLV type field is a subfield of this 16 bit field. it's only the seven most significant bits that constitute the subfield in question. Therefore the value of the subfield is '1', while the representation of the 16 bit field it comes from shows '0x0207' Thanks, Jaap Thanks. I got it. One question is regarding portID. POrtID subtype is 7. It means locally assigned port id. In my case local port id is 1. it is encoded as 31. why? thanks again Sothy Sound like the ASCII character 0x31 = “1” Regards Anders ___________________________________________________________________________ Sent via: Wireshark-users mailing list <wireshark-users () wireshark org<mailto:wireshark-users () wireshark org>> Archives: https://www.wireshark.org/lists/wireshark-users Unsubscribe: https://www.wireshark.org/mailman/options/wireshark-users mailto:wireshark-users-request () wireshark org<mailto:wireshark-users-request () wireshark org>?subject=unsubscribe
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Current thread:
- LLDP encoding sothy shan (Jun 12)
- Re: LLDP encoding Jaap Keuter (Jun 12)
- Re: LLDP encoding sothy shan (Jun 13)
- Re: LLDP encoding Anders Broman (Jun 13)
- Re: LLDP encoding sothy shan (Jun 13)
- Re: LLDP encoding sothy shan (Jun 13)
- Re: LLDP encoding Jaap Keuter (Jun 12)