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12-28-2015 03:00 AM
12-28-2015 03:00 AM
HP 1920 does not turn on ICMP redirect
HP 1920 does not turn on ICMP redirect
I enter in the CLI "ip redirects enable" - "Error: The operation is not supported."
I tried on 1920-24G and 1920-8G
Syntax okay -
[HP 1920G Switch]ip redirects ? enable Enable the function
What's the trouble?
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12-28-2015 06:48 AM
12-28-2015 06:48 AM
Re: HP 1920 does not turn on ICMP redirect
Officially, CLI is not supported. You're lucky when functions present in CLI but not in data sheet work....like RIP and OSPF
But do you really really need redirect?
-Sending a redirect packet costs switch CPU, just routing to correct gateway is done in switch hardware at wire speed.
-Some hosts don't like redirect and keep sending traffic to wrong gateway. This might overwhelm HP1920 with huge amount of redirects to send.
-redirect is for /32 routes only. For each new destination IP , a redirect needs to be sent, adding a /32 route to host route table
-What's the gain for redirected host directly connected to 1920? With redirect, the switch will switch, without redirect, the switch will route at same speed. There's no shorter path.
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