topic RE: can't ping from core switch any vlan ip add! in ExtremeSwitching (EXOS/Switch Engine)

can't ping from core switch any vlan ip add!

CEFLOU — Sun, 07 Dec 2014 22:46:00 GMT

Hi all,

so, i configure my core switch (stack of 2 X670V) with different vlan interf ip adresses.
all my configuration is on the vrf-default.

i'm trying to ping in my core switch his interface but i have response "Packet transmit error; Destination unreachable"

there is my config!

create vlan VLAN2
config vlan VLAN2 tag 2
config vlan VLAN2 add ports 1:1-4 tagged
config vlan VLAN2 ipaddress 10.254.1.254/24
enable ipforwarding VLAN2
create vlan VLAN3
config vlan VLAN3 tag 3
config vlan VLAN3 add ports 1:1-4 tagged
config vlan VLAN3 ipaddress 10.254.3.254/23
enable ipforwarding VLAN3
create vlan VLAN6
config vlan VLAN6 tag 6
config vlan VLAN6 add ports 1:2-4 tagged
config vlan VLAN6 ipaddress 10.170.1.250/22
enable ipforwarding VLAN6

############### the result of my ping on vlan management ############

* Slot-1 PAR1SWT0030.32 # ping 10.254.3.254
Ping(ICMP) 10.254.3.254: 4 packets, 8 data bytes, interval 1 second(s).
Packet transmit error; Destination unreachable
Packet transmit error; Destination unreachable
Packet transmit error; Destination unreachable
Packet transmit error; Destination unreachable

--- 10.254.3.254 ping statistics ---
0 packets transmitted, 0 packets received, 0% loss
round-trip min/avg/max = 0/0/0 ms

###############################################################

I Need your help please, so i'm blocked for continuing my config

RE: can't ping from core switch any vlan ip add!

john16 — Sun, 07 Dec 2014 23:08:00 GMT

Not familiar with the Extreme side business might you have to enable the VLAN interface? Can you ping the vlan interface from the core itself? If not then the interface is likely down. Are you routing to the edge? Also have you checked your ACLs?

RE: can't ping from core switch any vlan ip add!

CEFLOU — Sun, 07 Dec 2014 23:11:00 GMT

so, i'm not familar witch EXTREME too, i havn't ACL!

i try to ping the core from itself, but i have the same error.

so, why i enable vlan interface? it's not look like othe constructor, i think that i juste create the interface witch his ip add!

RE: can't ping from core switch any vlan ip add!

Ravisekar__Raja — Sun, 07 Dec 2014 23:27:00 GMT

Hello CEFLOU,

Whether the vlan is up??, I mean whether the vlan assigned ports are up??

Can you share the output of show vlan??

Regards
Rajamanickam

RE: can't ping from core switch any vlan ip add!

CEFLOU — Sun, 07 Dec 2014 23:27:00 GMT

thanks RAVISEKAR,

it seems ok now.

RE: can't ping from core switch any vlan ip add!

BrandonC — Mon, 08 Dec 2014 12:48:00 GMT

Hi CEFLOU,

"Destination unreachable" means that the source does not have a route to the destination address. Does the switch you are pinging from have a route to the 10.254.3.254/23 subnet?

RE: can't ping from core switch any vlan ip add!

CEFLOU — Mon, 08 Dec 2014 14:13:00 GMT

Hi brandon, I pinging from the core switch, i try to ping themself first but anyway. I have 10 vlans on my core switch with 8 routed. His ip adresse was the GW for my différents vlans. Yes, i have a static route to the FW.

RE: can't ping from core switch any vlan ip add!

PARTHIBAN_CHINN — Mon, 08 Dec 2014 14:35:00 GMT

enable ipforwarding one more time.
I guess internal TTL is changed.
See if you can reboot for temporary workaround.
Let me know if this solves your issue.
there is a known issue.

RE: can't ping from core switch any vlan ip add!

Stephane_Grosj1 — Mon, 08 Dec 2014 15:06:00 GMT

Hi,

possible issues:

- you're on a different VR: you say that everything is on VR-Default, so I assume this is not the case. However you do say also "result of my ping in management vlan". The out of band management interface is in a different VR. So if you try to reach your vlan from the management vlan, that's the issue, assuming you didn't ping from the box itself (which defaults to VR-Default).

- the VLAN aren't Up: so that a VLAN is Up, you need at least one port Up in that vlan. A "sh vlan" would help to troubleshoot. You can create a loopback interface per vlan if needed.

if not that, as Parthiban said, try to re-enable ipforwarding.

Stephane

RE: can't ping from core switch any vlan ip add!

CEFLOU — Mon, 08 Dec 2014 16:19:00 GMT

thank's every body, it semms ok now.

i juste reconfigure my core and i reload it!

so i have another question about dhcp relay, i want to activate a dhcp relay on vlan data.

i configure the ip adresse of my dhcp server on vr-default then i just enable bootprelay on the vlan?

there is my conf:

configure bootprelay add 10.170.10.30 vr VR-Default
configure bootprelay add 10.170.10.31 vr VR-Default
enable bootprelay ipv4 vlan DATA

thank's for your help

RE: can't ping from core switch any vlan ip add!

CEFLOU — Mon, 08 Dec 2014 16:21:00 GMT

in my opinion it's not ok! for example, when we have another dhcp server on VOICE vlan, how we do?
how the client join his correct server?

RE: can't ping from core switch any vlan ip add!

PARTHIBAN_CHINN — Mon, 08 Dec 2014 16:23:00 GMT

enable bootprelay on other vlans as well.

RE: can't ping from core switch any vlan ip add!

CEFLOU — Mon, 08 Dec 2014 16:25:00 GMT

PARTHIBAN CHINNAYA, why i enable it please? i went just to activate it on data vlan!

RE: can't ping from core switch any vlan ip add!

Stephane_Grosj1 — Mon, 08 Dec 2014 17:13:00 GMT

you have to enable it on the server vlan and the clients vlans.

RE: can't ping from core switch any vlan ip add!

CEFLOU — Mon, 08 Dec 2014 17:15:00 GMT

ok, thanks.