- play_arrow Introduction
- play_arrow Common Features (All Deployment Modes)
- play_arrow L3 Features
- play_arrow Cloud-Native Router CNI Configuration Examples
- play_arrow Monitoring and Logging
- play_arrow Troubleshooting
- play_arrow Appendix
Storm Control
Read this topic to understand how the broadcast rate limiting feature is implemented by the cloud-native router when deployed in L2 mode.
The storm control or rate limiting feature controls the rate of egress broadcast, unknown unicast, and multicast (BUM) traffic on fabric interfaces.
Configuration Example
You specify the rate limit in bytes per second by adjusting stormControlProfiles in the values.yaml file before deployment.
# rate limit profiles for bum traffic on fabric interfaces in bytes per second
stormControlProfiles:
rate_limit_pf1:
bandwidth:
level: 0Once a profile is created, it can be assigned to the interface via the
storm-control-profile interface attribute. For example:
- eth1:
ddp: on
interface_mode: trunk
vlan-id-list: [100, 200, 300, 700-705]
storm-control-profile: rate_limit_pf1
native-vlan-id: 100
no-local-switching: trueThe system applies the configured profiles to all specified fabric interfaces in the cloud-native router. The maximum per-interface rate limit value you can set is 1,000,000 bytes per second.
If the unknown unicast, broadcast, or multicast traffic rate exceeds the set limit on a
specified fabric interface, the vRouter drops the traffic. You can see the drop counter
values by running the dropstats command in the vRouter CLI. You can see the
per-interface rate limit drop counters by running the vRouter CLI command vif --get
fabric_vif_id --get-drop-stats. For example:
dropstats L2 untag pkt drop 8832 L2 Src Mac lookup fail 880 Rate limit exceeded 29312474
When you configure a rate limit profile on a fabric interface, you can see the configured
limit in bytes per second when you run either vif --list or vif
--get fabric_vif_id.
vif0/2 PCI: 0000: af: 01.1 (Speed 10000, Duplex 1)
Type: Physical HWaddr: 76:5d: f5: f5: c1:7a
Vrf:0 Flags: L2Vof QOS:-1 Ref: 8 BUM Rate Limit: 1000000
RX port packets:1 errors:0
RX queue packets:1 errors:0
RX queue errors to lore 000000000000
Driver: net_iavf
Fabric Interface: 0000:af:01.1 Status: UP
Vlan Mode: Trunk Vlan: 300 500 600
RX packets:0 bytes:0 errors:1
TX packets:0 bytes:0 errors:0
Drops: 1The rate limit is only configurable on physical interfaces and only during deployment.
The existing global rate limit configuration fabricBMCastRateLimit is deprecated from release 22.4.
