[j-nsp] MX204 Maximum Packet Rates

[Tobias Heister]

Hi,

MX204 has some limitations in terms of pps rates for smaller packet 
sizes if inline-flow is configured compared to e.g. MX10003 not only but 
also related to the pfe/fabric layout (no fabric in 204). So even if 
they are the same pfe they might behave differently.

The details are not public, so you might want to reach out to your 
partner/SE.

regards
Tobias

On 20.05.2021 12:39, Peter Sievers wrote:
> Hi Leon,
> 
> both MX204 und MX10003/LC2103 use
> eagle forwarding ASIC, LC2103 Linecard has 3xASIC,
> MX204 has 1xASIC, WAN Output Rate for eagle
> pfe is for 100G Interface ~110 MPPS.
> 
> Assumption is, that you got the traffic on the
> MX10003 over more than one PFE/ASIC incoming.
> 
> BR,
> 
> .peter
> 
> On 20.05.21 11:49, Leon Kramer wrote:
>> Hello,
>>
>> during an approximate 240 Mpps / 80 Gbps UDP DDOS attack to one target IP
>> we have experienced a massive and immediate packet loss at an MX204 
>> router.
>>
>> The attack was coming in through MX10003 and MX204. The MX204 was not 
>> able
>> to forward more than 120 Mpps during the attack. The MX10003 forwarded 
>> 180
>> Mpps without any issue.
>>
>> Both routers are running Juniper 18.4R2-S3. The MX204 has all 4 x 100 
>> Gbps
>> interfaces active in use.
>>
>> Any idea if 120 Mpps for Juniper MX204 is already the hardware 
>> limitation?
>> This would equal to only roughly 41 Gbps of the attacks packet size of 43
>> bytes. We are certain that no policer or firewall filter lead to the 
>> packet
>> drops.
>>
>> Anyone has a recommendation what could be done to increase performance?
>>
>>
>> Kind Regards
>> Leon Kramer
>> _______________________________________________
>> juniper-nsp mailing list juniper-nsp at puck.nether.net
>> https://puck.nether.net/mailman/listinfo/juniper-nsp
>>
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