[c-nsp] Stange issue on 100 Gbs interconnection Juniper - Cisco

[james list]

yes same version
currently no traffic exchange is in place, just BGP peer setup
no traffic

Il giorno dom 11 feb 2024 alle ore 11:16 Igor Sukhomlinov <
dvalinswamp at gmail.com> ha scritto:

> Hi James,
>
> Do you happen to run the same software on all nexuses and all MXes?
> Do the DC1 and DC2 bgp session exchange the same amount of routing updates
> across the links?
>
>
> On Sun, Feb 11, 2024, 21:09 james list via cisco-nsp <
> cisco-nsp at puck.nether.net> wrote:
>
>> Dear experts
>> we have a couple of BGP peers over a 100 Gbs interconnection between
>> Juniper (MX10003) and Cisco (Nexus N9K-C9364C) in two different
>> datacenters
>> like this:
>>
>> DC1
>> MX1 -- bgp -- NEXUS1
>> MX2 -- bgp -- NEXUS2
>>
>> DC2
>> MX3 -- bgp -- NEXUS3
>> MX4 -- bgp -- NEXUS4
>>
>> The issue we see is that sporadically (ie every 1 to 3 days) we notice BGP
>> flaps only in DC1 on both interconnections (not at the same time), there
>> is
>> still no traffic since once noticed the flaps we have blocked deploy on
>> production.
>>
>> We've already changed SPF (we moved the ones from DC2 to DC1 and
>> viceversa)
>> and cables on both the interconnetion at DC1 without any solution.
>>
>> SFP we use in both DCs:
>>
>> Juniper - QSFP-100G-SR4-T2
>> Cisco - QSFP-100G-SR4
>>
>> over MPO cable OM4.
>>
>> Distance is DC1 70 mt and DC2 80 mt, hence is less where we see the issue.
>>
>> Any idea or suggestion what to check or to do ?
>>
>> Thanks in advance
>> Cheers
>> James
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>