[j-nsp] MX204 vs. MX240??

[Aaron Gould]

Funny thing about the (8) sfp+ ports which do 1/10 gig... when you config a
port for 1 gig, it still is referenced as "xe" !  ... not "ge" as you would
expect.  :|

agould at site1-204-1> show system information
Model: mx204
Family: junos
Junos: 18.4R1-S3.1
Hostname: site1-204-1

agould at site1-204-1> show configuration interfaces xe-0/1/4 | display set
set interfaces xe-0/1/4 description site1-nid-1
set interfaces xe-0/1/4 flexible-vlan-tagging
set interfaces xe-0/1/4 mtu 9216
set interfaces xe-0/1/4 encapsulation flexible-ethernet-services
set interfaces xe-0/1/4 gigether-options speed 1g
<---------------- this is how to switch it to 1 gig
set interfaces xe-0/1/4 unit 100 encapsulation vlan-vpls
set interfaces xe-0/1/4 unit 100 vlan-id 100

...look how funny, speed says 10gbps (not, ha).... but speed config says
1G.....

agould at site1-204-1> show interfaces xe-0/1/4 media | grep speed
  Link-level type: Flexible-Ethernet, MTU: 9216, MRU: 9224, LAN-PHY mode,
Speed: 10Gbps, BPDU Error: None, Loop Detect PDU Error: None, MAC-REWRITE
Error: None, Loopback: None, Source filtering: Disabled, Flow control:
Enabled,
  Speed Configuration: 1G

....It's linked up to a device which only does 1 gig, so, it's working...

agould at dallas-204-1> show interfaces terse xe-0/1/4
Interface               Admin Link Proto    Local                 Remote
xe-0/1/4                up    up
xe-0/1/4.100            up    up   vpls
xe-0/1/4.32767          up    up   multiservice

agould at dallas-204-1> show chassis fpc pic-status
Slot 0   Online       MPC
  PIC 0  Online       4XQSFP28 PIC
  PIC 1  Online       8XSFPP PIC



- Aaron


-----Original Message-----
From: juniper-nsp [mailto:juniper-nsp-bounces at puck.nether.net] On Behalf Of
Clarke Morledge
Sent: Friday, November 8, 2019 8:39 AM
To: juniper-nsp at puck.nether.net
Subject: [j-nsp] MX204 vs. MX240??

I wanted to resurrect an old thread about the MX204, from a year and a 
half ago:

https://lists.gt.net/nsp/juniper/64290

My understanding is that the MX204 is a 1 RU MPC7, but with a few 
modifications. I understand that the eight 10Gig ports have been modified 
to allow for 1 Gig transceivers as well, and perhaps that the QSFP ports 
can accommodate a pigtail for providing a bunch of 1 Gig connections, if 
necessary.

The 10/40/100 capabilities of the MPC7 look great, but there are few 
isolated cases where I need to support legacy 1 gig, and the MX204 can now 
handle that. Is this true?

Also, I understand that the MX204 CPU and other resources are a vast 
improvement over the MX80, and that the MX204 can handle multiple full 
Internet route BGP feeds, just as well as the MX240 REs can, without 
compromise in performance.

The newer VM support inside the RE makes the requirements for an 
additional RE less important now, according to my understanding.

So, if you do not need a lot of speeds and feeds, and can live without a 
physical backup RE, the MX204 would be a good alternative to a MX240.

Have I made accurate assumptions??


Clarke Morledge
Network Engineering
Information Technology
Jones Hall (Room 18)
200 Ukrop Way
Williamsburg VA 23187
William & Mary
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