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VMAN
VMAN
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08-12-2014 01:31 PM
Hi, please help how to configure a VMAN. thanks
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08-13-2014 01:41 PM
Hi Paul, thanks a lot. very nice and simple explanation. this helps a lot. Regards, Marlon
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08-13-2014 12:18 PM
Hello Marion
In order to put a VLAN into a VMAN you need to have two switches so for example we cant bring in traffic into a VLAN on port 1 of a switch and go out port 10 in a VMAN.
So in order for us to do this you will have the VLAN switch, like at the edge of a customer prem where that traffic is tagged on the uplink. That uplink port, from the VLAN edge switch gets connected into an untagged port on the switch running the VMAN. What happens is that since the traffic coming into the VMAN will have a tag of 8100 the VMAn will see it as untagged traffic as the VMAN is set to recognize 88a8 traffic. That edge VMAN switch then gets connected to the other VMAN switches over a tagged link. see below
VLAN SW T-------(U)VMAN(T)------(T)VMAN(U)-----(T)VLAN
Does that help?
P
In order to put a VLAN into a VMAN you need to have two switches so for example we cant bring in traffic into a VLAN on port 1 of a switch and go out port 10 in a VMAN.
So in order for us to do this you will have the VLAN switch, like at the edge of a customer prem where that traffic is tagged on the uplink. That uplink port, from the VLAN edge switch gets connected into an untagged port on the switch running the VMAN. What happens is that since the traffic coming into the VMAN will have a tag of 8100 the VMAn will see it as untagged traffic as the VMAN is set to recognize 88a8 traffic. That edge VMAN switch then gets connected to the other VMAN switches over a tagged link. see below
VLAN SW T-------(U)VMAN(T)------(T)VMAN(U)-----(T)VLAN
Does that help?
P
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08-12-2014 11:52 PM
Hi Paul, thanks for the info. how can we add a vlan (Tagged or Untagged) to a vman? the tagged port of a vman is connected to another switch with vman? is this correct? sorry for my english. thanks
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08-12-2014 03:44 PM
Hello Marion. a VMAN is really the same as a VLAN. It is created using the create vman command and you configure the tag and add ports the same way as a VLAN.
For example
create vman extr
config extr tag 100
config extr add port 1 tag
Summit-PC.5 # sh vman
---------------------------------------------------------------------------------------
Name VID Protocol Addr Flags Proto Ports Virtual
Active router
/Total
---------------------------------------------------------------------------------------
extr 100 -------------------- ----------------------------- ANY 1 /1 VR-Default
---------------------------------------------------------------------------------------
Flags : (a) Learning Domain, (B) 802.1ah Backbone VMAN,
(c) 802.1ad customer VLAN, (C) EAPS Control vlan, (E) ESRP Enabled,
(f) IP Forwarding Enabled, (F) Learning Disabled, (i) ISIS Enabled,
(I) IP Forwarding lpm-routing Enabled, (L) Loopback Enabled,
(m) IPmc Forwarding Enabled, (n) IP Multinetting Enabled, (N) Network LogIn vlan,
(N) Network LogIn vlan, (o) OSPF Enabled, (O) Flooding Disabled,
(p) PIM Enabled, (P) EAPS protected vlan, (r) RIP Enabled,
(S) 802.1ah Service VMAN, (T) Member of STP Domain, (v) VRRP Enabled,
(V) VPLS Enabled, (W) VPWS Enabled
Total number of vman(s) : 1
* Summit-PC.6
using the command show vman ethertype will show the ethertype used for the tag. In XOS it defaults to the standard 0x88a8. to change the ethertype use the command config vman etherype
Does that help?
P
For example
create vman extr
config extr tag 100
config extr add port 1 tag
Summit-PC.5 # sh vman
---------------------------------------------------------------------------------------
Name VID Protocol Addr Flags Proto Ports Virtual
Active router
/Total
---------------------------------------------------------------------------------------
extr 100 -------------------- ----------------------------- ANY 1 /1 VR-Default
---------------------------------------------------------------------------------------
Flags : (a) Learning Domain, (B) 802.1ah Backbone VMAN,
(c) 802.1ad customer VLAN, (C) EAPS Control vlan, (E) ESRP Enabled,
(f) IP Forwarding Enabled, (F) Learning Disabled, (i) ISIS Enabled,
(I) IP Forwarding lpm-routing Enabled, (L) Loopback Enabled,
(m) IPmc Forwarding Enabled, (n) IP Multinetting Enabled, (N) Network LogIn vlan,
(N) Network LogIn vlan, (o) OSPF Enabled, (O) Flooding Disabled,
(p) PIM Enabled, (P) EAPS protected vlan, (r) RIP Enabled,
(S) 802.1ah Service VMAN, (T) Member of STP Domain, (v) VRRP Enabled,
(V) VPLS Enabled, (W) VPWS Enabled
Total number of vman(s) : 1
* Summit-PC.6
using the command show vman ethertype will show the ethertype used for the tag. In XOS it defaults to the standard 0x88a8. to change the ethertype use the command config vman etherype
Does that help?
P
