|
Feature |
Product |
Release introduced |
|---|---|---|
|
Egress Tunnel Shaping |
5420 Series |
Not Supported |
|
5520 Series |
Not Supported |
|
|
VSP 4450 Series |
Not Supported |
|
|
VSP 4900 Series |
Not Supported |
|
|
VSP 7200 Series |
Not Supported |
|
|
VSP 7400 Series |
Not Supported |
|
|
VSP 8200 Series |
Not Supported |
|
|
VSP 8400 Series |
Not Supported |
|
|
VSP 8600 Series |
Not Supported |
|
|
XA1400 Series |
VOSS 8.1 |
|
|
Egress Shaper for Fabric Extend tunnels on Fabric IPsec Gateway virtual machine |
5420 Series |
Not Supported |
|
5520 Series |
Not Supported |
|
|
VSP 4450 Series |
Not Supported |
|
|
VSP 4900 Series |
VOSS 8.3.1 |
|
|
VSP 7200 Series |
Not Supported |
|
|
VSP 7400 Series |
VOSS 8.3.1 |
|
|
VSP 8200 Series |
Not Supported |
|
|
VSP 8400 Series |
Not Supported |
|
|
VSP 8600 Series |
Not Supported |
|
|
XA1400 Series |
Not Supported |
Egress Tunnel Shaping shapes traffic on a Fabric Extend (FE) tunnel. Egress Tunnel Shaping limits transmission rate by shaping the output load. Egress Tunnel Shaping differs from Port Egress Shaping. Port Egress Shaping limits transmission rate by port and by queue. Egress Tunnel Shaping operates on VXLAN virtual ports.
On XA1400 Series the default egress tunnel shaper is 1 Gbps on all FE tunnels and has only one QoS queue.
When you enable Egress Tunnel Shaping, it shapes unicast, multicast, and unknown unicast egress traffic according to the feature configuration. Shapers you configure shape all traffic on the tunnel. Shapers you configure can have between 1 Mbps and 1 Gbps of bandwidth allocated to them.
Eight traffic queues are created for the tunnel traffic when a new shaper is configured. Packets are mapped to any of these queues based on the internal Class of Service (CoS) of the packets. When multiple tunnels use the common shaper value, an internally unique shaper is associated for each tunnel. The following table shows the default minimum weight for each queue.
| Queue | Default Minimum Weight |
|---|---|
|
0 |
5 |
|
1 |
20 |
|
2 |
30 |
|
3 |
40 |
|
4 |
50 |
|
5 |
50 |
|
6 |
Rate limited to 50% of configured shaper rate |
|
7 |
Rate limited to 5% of configured shaper rate |
Queues 6 and 7 are rate limited and have a higher priority. The maximum traffic allowed out of queue 6 and queue 7 would be shape rate/2 (50% bandwidth) and shape rate/20 (5% bandwidth).
The XA1400 Series uses a Hierarchical Token Bucket (HTB) scheduling algorithm. HTB controls the use of the outbound bandwidth on a link, allowing the use of one physical link or virtual link to simulate several slower links and to send different kinds of traffic on different simulated links. HTB shapes traffic based on the Token Bucket Filter algorithm which does not depend on interface characteristics, or the underlying bandwidth of the outgoing interface.
The configured bandwidth sum of all shaped FE tunnels is higher than the total amount of available head-end bandwidth. Egress Tunnel Shaping is oversubscribed so that all the available and unused bandwidth is allotted to a branch node if other branch nodes are not using it.
Buffer allocation and burst rate are fixed and cannot be configured.
Note
Tunnel shaping granularity may not be accurate, and differ from the user configured values, when packets are fragmented if the packet size is greater than the FE tunnel MTU. This is because when packet fragmentation happens there is a higher packet header overhead.
Configuration of Egress Tunnel Shaping requires supporting SPBM and Fabric Extend configurations. For more information on these configurations, see the following sections: