protocol based VLAN not working

[Wanderley_Benac]

Configuration done to perform packet filter based on "Protocol Based VLAN", traffic was captured via mirroring and I see packets are not forwarding to correct VLAN.

Configuration for port 7:
Summit48si:18 # show port 7 vlan info
Name VID Protocol Addr Flags Proto Ports
Payload 333 10.10.20.130 /25 ------f------- mnet 11/20
OM_Node 332 10.10.20.50 /28 v-----f------- ANY 10/20
OM_RPP 192 192.168.0.2 /24 ------f------- mnet 11/20
Internal 46 ------------------ -------- p1 7/36

Mirror Results:
1) Using "enable mirror add port 7 vlan "Payload" I just see traffic to network 10.10.20.128/25. There is no traffic from network 10.10.20.128/25

2) Using "enable mirror add port 7 vlan OM_Node" I am able to see traffic from network 10.10.20.128/25, but traffic is been received by different VLAN than expected which proves mnet protocol based is not working for some reason!

Additional Information:
- It happens for swiches Summit 48si running EOS "7.8.4.1 patch1-r4" & EOS "7.8.4.1".
- "enable multinet" is configured
- "create protocol mnet" is configured

Someone can help me uinderstand what is wrong?
Thanks in advance,
Wanderley Benacchio Junior

[Erik_Auerswald]

Hi,

as I understand it, IP Multinetting (enable multinet) is used as a proprietary substitute for secondary IP addresses which were not supported until ExtremeWare 7.3:

IP multinetting is used in many legacy IP networks when there is need to overlap multiple subnets onto the same physical segment. Though it can be a critical element in a transition strategy, due to the additional constraints introduced in troubleshooting and bandwidth, it is recommended that multinetting be used as a transitional tactic, and not as a long-term network design strategy.

I do not see any provision to separate the traffic into different VLANs. On the contrary, this multinetting seems to join the different VLANs together.

Please note that I have not used or tried out the multinetting feature, I just try to understand it based on the documentation.

Br,
Erik

[Erik_Auerswald]

Hi Wanderley,

your questions seems to be related the IP Multinetting Operation section starting on page 670 of the ExtremeWare 7.8 User Guide. There a dummy protocol mnet is created w/o protocol parameters.

In the examples there, one of the VLANs is configured to use protocol ip, all others to use mnet.

Br,
Erik

[Henrique]

Based on the User Guide example, it seems that changing your vlan "OM_Node" protocol filter from "ANY" to "ip" should work.

There are 2 important comments:

• All VLANs used in the multinetting application must share the same port assignment.
• One VLAN is configured to use an IP protocol filter. This is considered the “primary” VLAN interface for the multinetted group.

[BrandonC]

Erik is correct, 'mnet' is a protocol filter that you created, and it must be manually defined as to what traffic goes into it.