01-19-2012 02:39 PM
Hi all,
We are deploying SVS layer 3 mode on nexus1000v and we are considering to use ERSPAN on the same 1000v as well.
We want to seperate the vsm traffic and ERSPAN traffic so we will build two layer3 capability support VMkernal interfaces.
One question come into my mind:
Due to ERSPAN configuration won't identify GRE sourec IP, how 1000v VEM know which VMkernal interface to use for ERSPAN?
Any response is highly appreciated.
Best Regards,
Solved! Go to Solution.
01-20-2012 11:47 AM
Hi David,
N1000v does not support two VMKNics with l3control capability on the same host. You should only configure one and thes ERSPAN and L3control traffic will share the same VMKNic for forwarding.
Let me know if you have any more questions on this.
Thanks,
Deniz
01-19-2012 09:36 PM
Hi David,
when you configure ERSPAN, you need to configure an ERSPAN port-profile on N1K and apply the port-profile to already configured vmkernel interface used for ERSPAN, by which VEM will use the special interface for ERSPAN traffic.
Please reference below doc:
BR,
John Meng
01-20-2012 12:32 AM
Hi John,
Thank you very much for prompt response
Possibly my question confused you.
Let us be more specific:
My ERSPAN and SVSL3 port-profile config as below
port-profile type vethernet ERSPAN
capability l3control
vmware port-group
switchport mode access
switchport access vlan 100
no shutdown
system vlan 100
state enabled
port-profile type vethernet SVSL3
capability l3control
vmware port-group
switchport mode access
switchport access vlan 200
no shutdown
system vlan 200
state enabled
----------------------------------------------
vmk1 for ERSPAN:
IP: 10.1.1.1 (vlan 100)
vmk2 for SVS layer 3 mode:
IP 10.1.2.1 (vlan 200)
====================================
ERSPAN config
monitor session 1 type erspan-source
source interface Vethernet1 both
destination ip 10.1.3.199
erspan-id 100
ip ttl 64
ip prec 0
ip dscp 0
mtu 1500
header-type 2
no shut
==========================================================
So from the above config, how ERSPAN knows which vmk interface to use for ERSPAN traffic source IP if there are connectivity to 10.1.3.199 from both vmk interfaces?
01-20-2012 11:47 AM
Hi David,
N1000v does not support two VMKNics with l3control capability on the same host. You should only configure one and thes ERSPAN and L3control traffic will share the same VMKNic for forwarding.
Let me know if you have any more questions on this.
Thanks,
Deniz
01-20-2012 06:54 PM
Hi Deniz,
Thank you very much!
BG
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