ZyXEL Communications ES-3124F Manual
RSTP and MVR
(Rapid Spanning Tree Protocol + MVR)
Ring work as the Aggregation Layer
Ethernet Switch
ZyNOS 3.7
Support Notes
Version 3.70
December 2006
RSTP and MVR Support Note II
All contents copyright (c) 2006 ZyXEL Communications Corporation. 2
Overview of RSTP
ZyXEL Management Switch uses IEEE 802.1w RSTP (Rapid Spanning Tree
Protocol) that allows faster convergence of the spanning tree than STP (while
also being backwards compatible with STP-only aware bridges). In RSTP,
topology change information is directly propagated throughout the network
from the device that generates the topology change. In STP, a longer delay is
required as the device that causes a topology change first notifies the root
bridge and only then notifies the network. Both RSTP and STP flush unwanted
learned addresses from the filtering database. In RSTP, the port states are
Discarding, Learning, and Forwarding.
(Rapid) STP detects and breaks network loops and provides backup links
between switches, bridges or routers. It allows a switch to interact with other
(R)STP -compliant switches in your network in order to ensure that only one
path exists between any two stations on the network.
Note: "STP" refers to both STP and RSTP on ZyXEL Management Switch.
Overview of MVR
Multicast VLAN Registration (MVR) is designed for applications (such as
Media-on-Demand (MoD)) that use multicast traffic across an Ethernet
ring-based service provider network.
MVR allows one single multicast VLAN to be shared among different
subscriber VLANs on the network. While isolated in different subscriber VLANs,
connected devices can both subscribe to and unsubscribe from the multicast
stream in the multicast VLAN. This improves bandwidth utilization with
reduced multicast traffic in the subscriber VLANs, and simplifies multicast
group management.
RSTP and MVR Support Note II
All contents copyright (c) 2006 ZyXEL Communications Corporation. 3
Scenario of RSTP + MVR (Ring works as the aggregation later)
In the following section, we will provide an example to illustrate how to create a
multicast network with IGMP Router (IGMP L3 Switch), IGMP Snooping L2
Switch on a ring using RSTP, and MVR L2 Switch with IGMP Snooping
Enabled. In this scenario, the Video Servers are located in VLAN200. Thus,
the Multicast VLAN is going to be VLAN200.
There are two clients subscribing the Multicast Video. One of them is located in
VLAN 5 and the other one is located in VLAN 10. IGMP Route is enabled on
the IGMP L3 Switch. RSTP, IGMP Snooping is enabled on the Aggregation
layer L2 Switches which located in the ring. MVR is enabled on the Access
Layer L2 Switches which are used for connecting with the clients.
Action to perform in this scenario:
1. Create and activate VLAN and IGMP Route on the L3 Switch.
2. Create and activate VLAN, RSTP, IGMP Snooping on the Aggregation
Layer Switches
3. Create and activate VLAN, IGMP Snooping, MVR on the Access Layer L2
Switches
Illustration of this scenario
RSTP and MVR Support Note II
All contents copyright (c) 2006 ZyXEL Communications Corporation. 4
Configuration using the Web GUI - ZyXEL L3 Management
Switch
1. Connect port 1 with a PC or Notebook via the RJ45 Cable.
2. By default, the MGMT IP of the out-band port is 192.168.0.1/24
3. Set your NIC to 192.168.0.100/24
4. Open an Internet browser (e.g. IE) and enter http://192.168.0.1 in the
URL field.
5. By default, the username for the administrator is “admin” and the
corresponding password is “1234”.
6. After successful login you will see a screen similar to the one on the
screenshot below.
7. First of all, the IP domain of the video servers is 192.168.10.1/24. The
video servers will be put under VLAN200, so we will need to create
VLAN200 as well as the IP domain on the Switch first. To do so, click
RSTP and MVR Support Note II
All contents copyright (c) 2006 ZyXEL Communications Corporation. 5
“Advanced Application” Æ“VLAN”.
8. Click the “Static VLAN” to create the VLAN first.
9. Now, tick the “Active” check box to activate the VLAN. Give it a name
as well as its VID (200 in our case). Since the Video Servers are
connected to port 10 through another L2 VLAN unaware Switch, we
need to take away the “Tx Tagging” and let the Switch to take away the
VLAN tag during Egress. Port 12 should be joined to the VLAN200
since it is used to connect to the first MVR L2 Switch. Finally click
“Add” to create this VLAN.
RSTP and MVR Support Note II
All contents copyright (c) 2006 ZyXEL Communications Corporation. 6
10.When the task is finished, go back to the VLAN Status screen and click
“VLAN Port Setting” to modify the PVID.
11.For PVID, it is necessary to assign the port 10 with PVID200 since all
the packets coming from the video servers are untagged. This Switch
should apply the VID200 tag to all those packets in order for them to
go into VLAN 200. Click “Apply” to apply your changes.
RSTP and MVR Support Note II
All contents copyright (c) 2006 ZyXEL Communications Corporation. 7
12.Second, since the VLAN is ready now, we need to create the
corresponding IP domain for this VLAN. To create a new IP domain,
click “IP Setup” under “Basic Setting”.
13.Since we will give the same IP domain as the video server, use
192.168.10.1 /24 again, and again, make it belong to VLAN 200. Click
“Add” to add this VLAN.
RSTP and MVR Support Note II
All contents copyright (c) 2006 ZyXEL Communications Corporation. 8
14.Now, the last step is to activate IGMP Route V2 in our newly created
IP Domain. To do so we click “IP Application” Æ“IGMP”.
15.First, tick the check box and assign “IGMP v2” to the IP domain
192.168.10.1/24.
RSTP and MVR Support Note II
All contents copyright (c) 2006 ZyXEL Communications Corporation. 9
16.Finally, in the upper right corner, click “Save” to write all the changes to
the memory. At this point everything is done on this Switch.
RSTP and MVR Support Note II
All contents copyright (c) 2006 ZyXEL Communications Corporation. 10
Configuration using the Web GUI - IGMP L2 Management
Switch [The first L2 Switch on the top of the ring]
1. Connect the port 1 with a PC or Notebook via the RJ45 Cable.
2. By default, the MGMT IP of the out-band port is 192.168.0.1/24
3. Set your NIC to 192.168.0.100/24
4. Open an Internet browser (e.g. IE) and enter http://192.168.0.1 in the
URL field.
5. By default, the username for the administrator is “admin” and the
corresponding password is “1234”.
6. After successful login you will see a screen similar to the one on the
screenshot below.
7. First, we are going to create the multicast VLAN 200 on this switch.
Also, RSTP is needed in our case to build the Aggregation layer ring
(3x IGMP L2 Switches) for case of physical wire being disconnected.
To enable the RSTP, click “Advanced Application” Æ“Spanning Tree
Protocol”.
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