[j-nsp] "show ip cef exact-route"

[Nikolas Geyer]

Someone at Juniper has kindly reached out and advised that a similar command was added in 17.1R1 for the MX;

https://www.juniper.net/documentation/en_US/junos/topics/reference/command-summary/show-forwarding-options-load-balance-ingress-interface.html

Sent from my iPhone

On 14 May 2018, at 8:22 pm, Aaron Gould <aaron1 at gvtc.com<mailto:aaron1 at gvtc.com>> wrote:

Cisco and iOS xr has been good for me... Show cef (vrf xyz) .....

Isn't Junos equivalent for showing FIB/PFE "show route forwarding...." ?  This usually is good for me too

Aaron

On May 14, 2018, at 6:35 PM, Nikolas Geyer <nik at neko.id.au<mailto:nik at neko.id.au>> wrote:

The platforms I have used it on it has been correct, but that doesn’t include ASR9k.

Scary to think what you have said could happen, but I guess I shouldn’t be surprised.

Sent from my iPhone

On 14 May 2018, at 7:32 pm, Saku Ytti <saku at ytti.fi<mailto:saku at ytti.fi>> wrote:

Have you found cef exact-route to be correct?

Last time I used this (ASR9000), it was giving wrong results to me. I
think there is entirely separate piece of code for LAG result in
software code and the CSCO EZChip microcode, and different people code
IOS-XR than ezchip, so I think there is failure mode where one code is
updated, and another is not, I hope I'm wrong.

But if I'm right, then the only way to do this, is actually ask the
microcode 'hey i have this packet, do a lookup for it', or like in
CAT7600/ELAM, get lookup results for real traffic.

On 15 May 2018 at 02:27, Nikolas Geyer <nik at neko.id.au<mailto:nik at neko.id.au>> wrote:
Unless it’s changed in newer releases there is no equivalent which is annoying.

I believe you can drop to the FPC vty and extract the information card by card similar to the link you shared, but it’s not exactly a workable solution, nor “officially supported” by Juniper.

The lack of this command is literally my biggest frustration with Juniper.

Sent from my iPhone

On 11 May 2018, at 4:40 am, James Bensley <jwbensley at gmail.com<mailto:jwbensley at gmail.com>> wrote:

Hi All,

Does anyone know of a command like the Cisco CEF "exact-route" command
on Juniper?

I've seen this older thread: https://lists.gt.net/nsp/juniper/50645

Which links to a post on using JSIM but for DPC cards, but I'm
interested in MPC cards:
http://junosandme.net/article-junos-load-balancing-part-3-troubleshooting-109382234.html

Does anyone have any details on using JSIM on MPC cards on MX
platforms? Or is there "another way" ?

I'm going to open a JTAC case as well as asking here however, in the
past they have rejected requests to explain PFE commands to me or
provide documentation for them. I have managed it a few times but only
after a couple of weeks of non-stop screaming. So I'm not holding my
breath for that option.

Kind regards,
James.
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