[j-nsp] QFX5100 ACLs

[Andrey Kostin]

Hi Brendan,

If you use filter-list on Lo0 interface as per "securing RE guide" then 
it's not supported. Only first filter in list is programmed and 
everything else is ignored. We ran into the same issue and had to pull 
it out from JTAC to confirm.

Brendan Mannella писал 04.12.2017 15:51:
> + Programmed: YES
>   + Total TCAM entries available: 1788
>   + Total TCAM entries installed  : 516
>
> Brendan Mannella
>
> TeraSwitch Inc.
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> On Mon, Dec 4, 2017 at 11:57 AM, Saku Ytti <saku at ytti.fi> wrote:
>
>> Hey Brendan,
>>
>> This is news to me, but plausible. Can you do this for me
>>
>> start shell pfe network fpc0
>> show filter
>> <pick your lo0 filter from above>
>> show filter hw <from above> show_term_info
>>
>> Compare how many TCAM entries are needed, and how many are 
>> available.
>>
>> Also if you can take a risk of reloading the FPC run:
>> show filter hw <from above> show_terms_brcm
>>
>> This may crash your PFE, if you actually did not have all of the
>> entries programmed in HW.
>>
>>
>> commit will succeed if you build filter which will not fit in HW,
>> there should be syslog entry, but no complain during commit. You 
>> will
>> end up having no filter or some mangled version of it. So it's just
>> alternative theory on why you may be accepting something you thought
>> you aren't.
>>
>>
>> On 4 December 2017 at 18:02, Brendan Mannella 
>> <bmannella at teraswitch.com>
>> wrote:
>> > Hello,
>> >
>> > So i have been testing QFX5100 product for use as a core L3 
>> switch/router
>> > with BGP/OSPF. I have my standard RE filter blocking various 
>> things
>> > including BGP from any unknown peer. I started to receive errors 
>> in my
>> logs
>> > showing BGP packets getting through from hosts that weren't 
>> allowed.
>> After
>> > digging around i found that Juniper apparently has built in ACL to 
>> allow
>> > BGP, which bypasses my ACLs, probably for VCF or something.. Is 
>> there any
>> > way to disable this behavior or does anyone have any other 
>> suggestions?
>> >
>> > root at XXX% cprod -A fpc0 -c "show filter hw dynamic 47 show_terms"
>> >
>> > Filter name          : dyn-bgp-pkts
>> > Filter enum          : 47
>> > Filter location      : IFP
>> > List of tcam entries : [(total entries: 2)
>> > Entry: 37
>> >     - Unit 0
>> >     - Entry Priority 0x7FFFFFFC
>> >     - Matches:
>> >         PBMP 0x00000001fffffffffffffffc
>> >         PBMP xe
>> >         L4 SRC Port 0x000000B3 mask 0x0000FFFF
>> >         IP Protocol 0x00000006 mask 0x000000FF
>> >         L3DestHostHit 1 1
>> >     - Actions:
>> >         ChangeCpuQ
>> >             ColorIndependent param1: 1, param2: 0
>> >             CosQCpuNew cosq: 30
>> >         Implicit Counter
>> > Entry: 38
>> >     - Unit 0
>> >     - Entry Priority 0x7FFFFFFC
>> >     - Matches:
>> >         PBMP 0x00000001fffffffffffffffc
>> >         PBMP xe
>> >         L4 DST Port 0x000000B3 mask 0x0000FFFF
>> >         IP Protocol 0x00000006 mask 0x000000FF
>> >         L3DestHostHit 1 1
>> >     - Actions:
>> >         ChangeCpuQ
>> >             ColorIndependent param1: 1, param2: 0
>> >             CosQCpuNew cosq: 30
>> >         Implicit Counter
>> >                        ]
>> > _______________________________________________
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>>
>>
>>
>> --
>>   ++ytti
>>
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-- 
Kind regards,
Andrey Kostin