Switching

Hi Community,

I need deployment a BGP VPLS connection with a Huawei device but I have an error about encapsulation mismatch like describe the next output:

Instance: VS-VPLS-KOMPELLA
Edge protection: Not-Primary
Local site: CE-A (3)
connection-site Type St Time last up # Up trans
1 rmt EM

root@JUNIPER-POC-E01> ...-path | match "entry|encap|entries"
1:77753851:1:1/96 (2 entries, 1 announced)
Communities: target:3851:3851 Layer2-info: encaps: VLAN, control flags:[0x0] , mtu: 1500
1:77753851:3:1/96 (1 entry, 1 announced)
Page 0 idx 0, (group GR-IBGP type Internal) Type 1 val 0x42291d8 (adv_entry)
Communities: target:3851:3851 Layer2-info: encaps: VPLS, control flags:[0x40] Automatic-Site, mtu: 0, site preference: 100
Communities: Layer2-info: encaps: VPLS, control flags:[0x40] Automatic-Site, mtu: 0, site preference: 100

Why i cant change the VPLS encapsultation a VLAN o ETHERNET on BGP Deployments?

root@JUNIPER-POC-E01# commit check
re0:
[edit routing-instances VS-VPLS-KOMPELLA protocols vpls encapsulation-type]
'encapsulation-type ethernet-vlan'
Encapsulation type not valid for BGP vpls
error: configuration check-out failed

Please let me know your comments, additionally if you know ther are trick for interoperatibility about this deployment.

Thanks in advace

Hello,

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@Martin_m2n wrote:

 

 Why i cant change the VPLS encapsultation a VLAN o ETHERNET on BGP Deployments?

  

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Because RFC 4761 section 3.2.4 https://tools.ietf.org/html/rfc4761#section-3.2.4 says You cannot

 The Encaps Type for VPLS is 19.

The values are allocated by IANA https://www.iana.org/assignments/bgp-parameters/bgp-parameters.xhtml#bgp-l2-encapsulation-types-registry

Therefore, it is not standards-compliant to use any other encaps type value for BGP VPLS. Please go to Huawei box and make sure it is sending a standards-compliant Encaps Type value in Layer2-info community.

HTH

Thx
Alex

Great explanation and very clear,

Thanks for you support

BR

Martin