If I disable one of the PFEs, will PTX router use the remaining PFEs to route traffic. I think it does, just want some confirmation.
What is the FPC type?
@Abhishek: The FPC type is JNP10001-36MR-PIC as seen below:
> show chassis pic pic-slot 0 fpc-slot 0
FPC slot 0, PIC slot 0 information:
In general if a pfe is disabled (which happens sometimes due to fabric error or any other reason) the other pfes will work as expected.
You can check the pfe state with the following command
labroot@Switch> show chassis fpc errorsFPC Level Occurred Cleared Threshold Action-Taken Action0 Minor 0 0 10 0 LOG|Major 0 0 1 0 CM ALARM|Fatal 4 0 1 4 CM ALARM|Pfe-State: pfe-0 -ENABLED | pfe-1 -ENABLED | pfe-2 -ENABLED |
So if pfe-0 is disabled the other pfe, pfe-1 and pfe-2 shall function as expected
First you need to make sure all your ECMP path has member across different PFEs, either ae bundle or parallel links
Second, in most cases of single PFE failure, system will disable the PFE by disabling the WAN link. By protocol convergence, traffic is routed to other PFEs
Hope this has addressed your concern
How can I verify that ECMP path has members across different PFEs? Thanks.
Hi Pluu,If one PFE wedges or doesn't function for some reason others will continue to function. Whether or not those PFE route traffic totally depend on your network design.You need to design your IP network in a way so that you have ECMP and your forwarding next-hops are on more than one PFE.
Here are some example and theory for your reference:
https://www.juniper.net/documentation/en_US/junos/topics/topic-map/ecmp-flow-based.html <<< this is for srx but concept remains same
https://www.juniper.net/documentation/en_US/junos/topics/usage-guidelines/policy-configuring-per-packet-load-balancing.htmlPS: Please accept my response as solution if it answers your query, kudos are appreicated too!ThanksVishal
below documnet tells you the mapping of interface to the PFE for EX switches :
For PTX I believe you will be able to get on the hardware
for ECMP you need to have multiple ports connected to the same device probably at RTG or trunking which will ensure stable communication even incase of PFE failure