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March 26th, 2024 17:52

VLAN IPv6 address does not ping on S5232F-ON

VLAN 100 is set as:

OS10(conf-if-vl-100)# ipv6 address 1::1/120

port-channel Interface 1/1/1:1 is using VLAN 100:

OS10(conf-if-eth1/1/1:1)# switchport trunk allowed vlan 100,200

From a Linux machine connected to that port-channel on VLAN 100, traceroute6 works (meaning it tells me 1::1, exists):

 traceroute6 1::1
traceroute to 1::1 (1::1), 30 hops max, 80 byte packets
 1  1::1 (1::1)  0.355 ms  0.186 ms  0.315 ms

If 1::1 is removed from VLAN 100, then the traceroute fails, thus we know it is there.

However, ping6 does not return:

ping6 -c 3 1::1
PING 1::1(1::1) 56 data bytes

--- 1::1 ping statistics ---
3 packets transmitted, 0 received, 100% packet loss, time 2066ms

I am looking for a way to enable ping for the IPv6 VLAN interfaces.

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March 27th, 2024 21:21

This was caused by using a /120 and not enabling IPv6 extended prefix routes.   See:  https://www.dell.com/support/kbdoc/en-us/000210182/dell-emc-networking-os10-ipv6-extended-prefix-routes?lwp=rt

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3.4K Posts

March 27th, 2024 02:36

Hi,

 

Do you mind sharing the full configuration of the VLAN100, #show running-config interface VLAN 100 for us to check if there is any miss. 

 

This is an example of the IPv6 config on interface: https://dell.to/3TSW1aN

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