nanog mailing list archives
Re: Juniper Config Commit causes Cisco Etherchannels to go into err-disable state
From: Michel de Nostredame <d.nostra () gmail com>
Date: Wed, 18 Apr 2018 10:41:39 -0700
Not sure exactly what your environment looks like, but we encountered something similar when trunking Cisco-DELL and Cisco-Juniper switches. We run RSTP on DELL and Juniper switches, but RPVST+ on Cisco. In the beginning we just allow those VLANS we need between Cisco-DELL/Juniper switches, then encountered unexpected err-disable / link drop things. Later we figured Cisco always carry default VLAN (VLAN-1) untagged through trunk ports. Hence we manually "explicitly" add/allow Native-VLAN-1 (untagged) on all trunk ports in all switches. Problem solved. On Fri, Apr 6, 2018 at 11:59 AM, Mark Milhollan <mlm () pixelgate net> wrote:
Sounds like the Juniper is leaking a "default" BPDU as it resets the various internal chip configurations, which the Cisco receives thus triggering the err-disable. /mark
-- -- Michel~
Current thread:
- Juniper Config Commit causes Cisco Etherchannels to go into err-disable state Joseph Jenkins (Apr 05)
- RE: Juniper Config Commit causes Cisco Etherchannels to go into err-disable state Robert Webb (Apr 05)
- Re: Juniper Config Commit causes Cisco Etherchannels to go into err-disable state Joseph Jenkins (Apr 05)
- RE: Juniper Config Commit causes Cisco Etherchannels to go into err-disable state Naslund, Steve (Apr 05)
- Re: Juniper Config Commit causes Cisco Etherchannels to go into err-disable state Joseph Jenkins (Apr 05)
- Re: Juniper Config Commit causes Cisco Etherchannels to go into err-disable state Joseph Jenkins (Apr 05)
- Re: Juniper Config Commit causes Cisco Etherchannels to go into err-disable state Mark Milhollan (Apr 06)
- Re: Juniper Config Commit causes Cisco Etherchannels to go into err-disable state Michel de Nostredame (Apr 19)
- Re: Juniper Config Commit causes Cisco Etherchannels to go into err-disable state Joseph Jenkins (Apr 05)
- RE: Juniper Config Commit causes Cisco Etherchannels to go into err-disable state Naslund, Steve (Apr 05)
- RE: Juniper Config Commit causes Cisco Etherchannels to go into err-disable state Robert Webb (Apr 05)
- Re: Juniper Config Commit causes Cisco Etherchannels to go into err-disable state Keenan Tims (Apr 06)
- Re: Juniper Config Commit causes Cisco Etherchannels to go into err-disable state Marian Ďurkovič (Apr 06)