★ S6520 Free resource decreased to or below minor threshold 20%
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Network Topology
Not involved
Problem Description
In the log, there are many alarms that the ARP and nexthoppool1 resources use more than 80%, but there are about 300 routing entries on the device, which is far from the number of alarms, and the total number of ARP resources should not be only 7680.
%Apr 25 13:44:59:807 2023 H3C6520_core RESMON/4/RESMON_MINOR: -Slot=2; -Resource=arp-Total=7680-Used=6144-Free=1536; Free resource decreased to or below minor threshold 20%.
%Apr 25 15:43:41:905 2023 H3C6520_core RESMON/5/RESMON_MINOR_RECOVERY: -Slot=7; -Resource=arp-Total=7680-Used=6143-Free=1537; Free resource increased above minor threshold 20%.
%Apr 25 15:43:44:107 2023 H3C6520_core RESMON/5/RESMON_MINOR_RECOVERY: -Slot=6; -Resource=arp-Total=7680-Used=6143-Free=1537; Free resource increased above minor threshold 20%.
%Apr 25 15:43:52:969 2023 H3C6520_core RESMON/5/RESMON_MINOR_RECOVERY: -Resource=arp-Total=7680-Used=6143-Free=1537; Free resource increased above minor threshold 20%.
%Apr 25 15:44:00:576 2023 H3C6520_core RESMON/5/RESMON_MINOR_RECOVERY: -Slot=2; -Resource=arp-Total=7680-Used=6143-Free=1537; Free resource increased above minor threshold 20%.
Process Analysis
According to the diagnosis information, the current ARP number of the device is 6133, and the maximum ARP is 65536.
===============arp statistics slot 1===============
Entry statistics:
Valid = 6143 Dummy = 0
Long static = 0 Short resolved = 0
Multiport = 0 L3 short = 0
Packet = 5275 OpenFlow = 0
Rule = 0 ARP input = 189544263
Resolved = 1062289
Running information:
Max ARP = 65536 Max multiport = 128
Default blackhole = 1 Max blackhole = 4096
Timer queue = 0 Event queue = 0
Packet queue = 0 LIPC send queue = 4096/0/2
Solution
The meaning of the log is as follows. If arp does not enable uni, it will occupy nextHop resources, and the device specification is 7.5k. Due to this resource, the maximum specification is 7.5k (7680). If uni is enabled, nexthop resources will not be occupied. It can reach 64k (65536).
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Message text |
-Resource=[STRING]-Total=[STRING]-Used=[STRING]-Free=[STRING]; Free resource decreased to or below minor threshold [STRING]. [STRING]. |
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Variable fields |
$1: Resource type. $2: Total amount. $3: Used amount. $4: Available amount. $5: Minor resource depletion threshold. $6: Resource usage description. Some types of resources do not have description information. |
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Severity level |
4 |
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Example |
RESMON/4/RESMON_MINOR: -Resource=AA-Total=100%-Used=83%-Free=17%; Free resource decreased to or below minor threshold 20%. |
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Explanation |
When the available resource amount decreases to or below the minor resource depletion threshold, the resource type enters minor alarm state and the device outputs this log message periodically. |
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Recommended action |
Configure the device based on the resource type so the device allocates the type of resources reasonably. |
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Message text |
-Resource=[STRING]-Total=[STRING]-Used=[STRING]-Free=[STRING]; Free resource increased above minor threshold [STRING]. [STRING]. |
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Variable fields |
$1: Resource type. $2: Total amount. $3: Used amount. $4: Available amount. $5: Minor resource depletion threshold. $6: Resource usage description. Some types of resources do not have description information. |
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Severity level |
5 |
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Example |
RESMON/5/RESMON_MINOR_RECOVER: -Resource=AA-Total=100%-Used=77%-Free=23%; Free resource increased above minor threshold 20%. |
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Explanation |
When the available resource amount increases above the minor resource depletion threshold, the resource type enters recovered state. The device removes the minor resource depletion alarm and outputs this log message. |
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Recommended action |
No action is required. |
arp mode uni
Use arp mode uni to configure a port as a customer-side port.
Use undo arp mode to restore the default.
Syntax
arp mode uni
undo arp mode
Default
A port operates as a network-side port.
Views
VLAN interface view
VXLAN VSI interface view
Predefined user roles
network-admin
Usage guidelines
By default, a port operates as a network-side port. The device associates an ARP entry with routing information when the interface learns an ARP entry. The ARP entry provides the next hop information for routing.
When the port operates as the customer-side port, the device will not associate the routing information with the learned ARP entries, thus saving hardware resources.
Restricted to the hardware next hop resources on the device, the maximum number of dynamic ARP entries that a network-side port can learn might be smaller than the value you set, and it might be different from that on a network-side port. Select an appropriate operating mode for a port according to the port location in your live network.
Examples
# Configure VLAN-interface 2 as a customer-side port.
[Sysname] interface vlan-interface 2
[Sysname-Vlan-interface2] arp mode uni