C9500-48Y4C IOS-XE Upgrade in SVL mode

[rashad_cisco]

Hi Guys

we have faced the upgrade process of Catalyst C9500-48Y4C in SVL stack.

Is there any method to perform upgrade without reboot of both switch or reload them in turn ?

Br

Rashad

[Leo Laohoo]

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@rashad_cisco wrote:
Is there any method to perform upgrade without reboot of both switch

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Yes, there is.  Refer to the attachment and go straight to Chapter 2.  

Hope this helps. 

[rashad_cisco]

Hi Leo Laahoo

thanks for your reply and information.

But I am wondering about such methods as ISSU and use some redundancy features of SVL technics.

Because here 24/7 business and reload of switches is not so acceptable during non-business our even.

[Leo Laohoo]

Make sure raise a pro-active Cisco TAC when performing an ISSU upgrade.  TAC must be on a WebEx session and watching because if the ISSU fails, it fails spectacularly.

[rashad_cisco]

Hi Guys

may be for someone will be useful following links regarding C9500-48YC SVL stack switches soft upgrade:

 https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst9500/software/release/17-9/configuration_guide/ha/b_179_ha_9500_cg/configuring_issu_on_stackwise_virtual.html

they say that you can upgrade SVL cluster soft version via ISSU.

Br

Rashad