[c-nsp] Migrating multi 1Gb port-chan member ints to 10G .....possible withot having to create a new portchan?

Wed Jun 14 00:04:40 EDT 2017

Well tried this last night, and the ASR1K did not cooperate.....4500X, played nice and behaved like the 2960 (Adding 10G ports to the portchan, rejected them due to speed difference, but still adds them to the portchan, but in suspended mode....so all good there, but ASR1K, (As well as only allowing 4 member ints in a portchan.,,which was a tad inconvenient), when attempting to add the 10G port, it simply rejects them due to bandwidth, ie, does not put the port into suspended mode/add it to the member Ints config......so, if you remove the 1G links, portchan would have no members....you would have to add 10G members after removing all 1G.....but Im almost positive the ASR will not allow me to remove all the 1G ints, due to the subinterfaces (I didnt want to test this on the production ASR1K, maintenance window was only short).....so, going to test it on an asr1001, and see what the result is....I really really hope I can just shutdown the portchan, remove all the 1G ints, add the 10G;s then re-enable the portchan...I hope I dont have to remove portchan, remove 1G ints from it, re-create it, then add the 10G's.....subints are referenced in ospf/bgp etc....wouldnt surprise me if they were dynamically removed...other option is to change startup conf, save, reboot (Or potentially save, then replace running with startup.....but having done that on previous  occasions, it doesnt always go smoothly 😉)

________________________________
From: cisco-nsp <cisco-nsp-bounces at puck.nether.net> on behalf of CiscoNSP List <CiscoNSP_list at hotmail.com>
Sent: Tuesday, 13 June 2017 8:25 AM
To: Tom Hill; cisco-nsp at puck.nether.net; Nick Cutting
Subject: Re: [c-nsp] Migrating multi 1Gb port-chan member ints to 10G .....possible withot having to create a new portchan?

I dont believe that you can remove all of a portcchan's member Ints (Ive not tested this, but read a forum post were someone was attempting something similar (1G->10G), and the router threw an error when attempting to remove the last 1G Int (Something along the lines of "portchan cannot be without physical interfaces due to sub-interfaces, at least one physical interface must be in the portchan")...I also had a quick look at the 1x10GSPA (SPA-1X10GE-L-V2 (XFP)), and I dont believe they are dual rate...ie dont support manual setting of speed/duplex....We have tested with an older lab switch (2960), manually setting ports to 100M (that are Gb Ints)...with 2 "100M ports" in the portchan, if you try to add the "1G" ports, it complains:

 %EC-5-CANNOT_BUNDLE2: Gi1/0/25 is not compatible with Gi1/0/1 and will be suspended (speed of Gi1/0/25 is 1000M, Gi1/0/1 is 100M)
 %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/25, changed state to down

Then removing the 2 x "100M" ports from portchan, the 2 x "1G" ports automatically came up, and stayed up, and portchan remained up....Im hoping we see similar behavior on the ASR1K/4500X (Under maintenance window, so small outage is ok).

Thanks
________________________________
From: cisco-nsp <cisco-nsp-bounces at puck.nether.net> on behalf of Tom Hill <tom at ninjabadger.net>
Sent: Tuesday, 13 June 2017 5:21 AM
To: cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] Migrating multi 1Gb port-chan member ints to 10G .....possible withot having to create a new portchan?

On 12/06/17 19:28, Nick Cutting wrote:
> I think this is possible, but with a little bit of downtime when you change the new links from 1000 to ten gig.
> You should be able to lab this up with 1000Mbit and 100Mbit on an old switch, nothing laying around?

If this causes a little downtime, why not just remove all the 1GE
interfaces and add the 10GE interface(s)?

You can pre-prepare the config and just paste it in, to avoid it taking
too much time. :)

--
Tom
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