nanog mailing list archives
Re: Newbie x Cisco IOS-XR x ROV: BCP to not harassing peer(s) and upstream(s)
From: Job Snijders via NANOG <nanog () nanog org>
Date: Wed, 11 May 2022 21:36:39 +0200
On Wed, May 11, 2022 at 01:22:32PM -0600, Grant Taylor via NANOG wrote:
On 5/11/22 10:53 AM, Job Snijders via NANOG wrote:This knob slightly increase your own memory consumption, but makes your router more “neighbourly”! :-)I question how accurate "slightly" is. My understanding is that soft reconfiguration inbound (whatever the syntax for a given IOS is) causes a full copy of the received prefix list to be retained in memory for each of the peers with soft reconfiguration enabled. So, to me, the amount of impact to memory will be based on both the number of prefixes advertised and the number of peers that soft reconfiguration is enabled on. Please enlighten me if I'm wrong / misunderstanding something.
How much memory exactly is consumed, will depend on the architecture of the application (whether duplicity of information such as path attributes is avoided as much as possible). Indeed, YMMV.
From experience at a previous employer I recall that
'soft-reconfiguration inbound' on routers (with multiple full routing tables) was problematic on 32-bit versions of the operating system; but not an issue on 64-bit. If unsure, test on a few peers and monitor memory usage! Its also a valid question to the Technical Assistance Center "hey, will enabling this soft-reconfiguration feature land me in hot water?" Kind regards, Job
Current thread:
- Newbie x Cisco IOS-XR x ROV: BCP to not harassing peer(s) and upstream(s) Pirawat WATANAPONGSE via NANOG (May 11)
- Re: Newbie x Cisco IOS-XR x ROV: BCP to not harassing peer(s) and upstream(s) Job Snijders via NANOG (May 11)
- Re: Newbie x Cisco IOS-XR x ROV: BCP to not harassing peer(s) and upstream(s) Mark Tinka (May 11)
- Re: Newbie x Cisco IOS-XR x ROV: BCP to not harassing peer(s) and upstream(s) Grant Taylor via NANOG (May 11)
- Re: Newbie x Cisco IOS-XR x ROV: BCP to not harassing peer(s) and upstream(s) Job Snijders via NANOG (May 11)
- Re: Newbie x Cisco IOS-XR x ROV: BCP to not harassing peer(s) and upstream(s) Lukas Tribus (May 11)
- Re: Newbie x Cisco IOS-XR x ROV: BCP to not harassing peer(s) and upstream(s) heasley (May 11)
- Re: Newbie x Cisco IOS-XR x ROV: BCP to not harassing peer(s) and upstream(s) Job Snijders via NANOG (May 11)
- Re: Newbie x Cisco IOS-XR x ROV: BCP to not harassing peer(s) and upstream(s) Tomoya Takezaki via NANOG (May 11)
- Re: Newbie x Cisco IOS-XR x ROV: BCP to not harassing peer(s) and upstream(s) Randy Bush (May 11)