Is there any compatible configuration command in JUNOS as following command in Cisco IOS.
lab-R2(config)#interface GigabitEthernet 0/1
lab-R2(config-if)#no ip route-cache
Mostly it is a describe of interface behaviour to disallow any route cache to be placed or stored on corelated single interface. Any help or clue would be appreciated. Or perhaps any thought that is has similiarity with ARP cache? Thanks.
Short answer is no.
Long answer is Cisco "ip route-cache" feature is not supported in JUNOS and no equivalent feature exists.
You can ignore this particular command when translating CSCO IOS config to JUNOS.
Could you help me with the understanding if this below command refers to the cached entries in FT ?
show route forwarding-table extensive | match cache
Also, isn't this knob similar to arp cache at interface level ?
I don't see any "cache" entries in FT on real MX2020, JUNOS 20.2 beta:
user@router> show isis adjacency
15 Jun 2020 01:28:15 EDT
Interface System L State Hold (secs) SNPA
ae0.0 PTX-2 2 Up 19
et-19/0/0.0 Core-NCS 2 Up 23
xe-13/0/0.0 P-3 2 Up 26
user@router> show route forwarding-table extensive | grep cach
15 Jun 2020 01:28:19 EDTuser@router> show route forwarding-table summary15 Jun 2020 01:33:46 EDTRouting table: default.inetInternet:user: 9 routesperm: 5 routesintf: 9 routesdest: 16 routes
Please specify the platform and JUNOS release. If You are doing this on vMX it is possible that You see flow cache entries which is an entirely different feature.
Thanks for answering that, I just wanted to understand the use case of FLAG cached in the output.
It may be related to this feature https://www.juniper.net/documentation/en_US/junos/topics/topic-map/mcast-forwarding-cache.html
Without multicast, there are no "cached" JUNOS FT entries as far as I can see.
Thanks for the quick answer and the link, it now clears my doubt.
Cached refers to multicast forwarding cache entries as per documentation you shared and not the cached ip routes.
Thanks, Alex. So it has no convert to JUNOS anyway.I also found the clue about multicast route cache and cache on forwarding table. But none of them are the same.
That relates to 'fast switching' which is what Cisco devices used before they introduced CEF.
This is vendor specific, and doesn't apply to Junos.
The Junos 'equivallent' (sort of) is separating the RE from the PFE to perform faster forwarding of frames and packets.