Enable errdisable auto recovery on cisco switch

Enable errdisable auto recovery on cisco switch

^{Created: 2021-04-12 21:58:33 | Last modified: 2021-04-12 22:23:52}
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How to enable err-disable auto recovery on a Cisco switch

We had a problem with one of our edge Cisco switches where the port linked into our service provider wouldn't recover after they performed upgrades on the Provider Edge (PE) routers. To get around this issue, we will need to enable auto recovery on our PE switch.

So looking through our logs, we saw the following lines that happened at the time of the upgrade. We also noticed that the interface stayed down longer than the provided outage window.

#show logging
Apr  5 14:21:03.250: %LINEPROTO-5-UPDOWN: Line protocol on Interface TenGigabitEthernet1/1/1, changed state to down
Apr  5 14:21:04.251: %LINK-3-UPDOWN: Interface TenGigabitEthernet1/1/1, changed state to down
Apr  5 14:24:25.368: %PM-4-ERR_DISABLE: link-flap error detected on Te1/1/1, putting Te1/1/1 in err-disable state

#show interface TenGigabitEthernet1/1/1
TenGigabitEthernet1/1/1 is down, line protocol is down(err-disabled)
  Hardware is Ten Gigabit Ethernet, address is e8eb.342c.b59d (bia e8eb.342c.b59d)
  Description: Vocus DFAS circuit
  MTU 9198 bytes, BW 10000000 Kbit/sec, DLY 10 usec,
     reliability 255/255, txload 5/255, rxload 4/255
  Encapsulation ARPA, loopback not set
  Keepalive not set
  Full-duplex, 10Gb/s, link type is auto, media type is SFP-10GBase-LR
  input flow-control is on, output flow-control is unsupported
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input never, output 00:00:00, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/2000/0/0 (size/max/drops/flushes); Total output drops: 0

Check if auto recovery is enabled for any of the features on the switch, in this example you can see they are not

#show errdisable recovery
ErrDisable Reason            Timer Status
-----------------            --------------
arp-inspection               Disabled
bpduguard                    Disabled
channel-misconfig            Disabled
dhcp-rate-limit              Disabled
dtp-flap                     Disabled
evpn-mh-core-isolation       Disabled
gbic-invalid                 Disabled
inline-power                 Disabled
l2ptguard                    Disabled
link-flap                    Disabled
mac-limit                    Disabled
link-monitor-failure         Disabled
loopback                     Disabled
oam-remote-failure           Disabled
pagp-flap                    Disabled
port-mode-failure            Disabled
pppoe-ia-rate-limit          Disabled
psecure-violation            Disabled
security-violation           Disabled
sfp-config-mismatch          Disabled
storm-control                Disabled
udld                         Disabled
psp                          Disabled
dual-active-recovery         Disabled
evc-lite input mapping fa    Disabled
mrp-miscabling               Disabled

Timer interval: 300 seconds

In this example, we only want to enable the auto recovery feature for the link-flap detection feature, to do this do the following config

#conf t
#errdisable recovery cause link-flap

Note: You can use the command "errdisable recovery cause all" to enable auto recovery for all causes

Check that the auto recovery has been enabled for link-flap and save the config

#show errdisable recovery
ErrDisable Reason            Timer Status
-----------------            --------------
arp-inspection               Disabled
bpduguard                    Disabled
channel-misconfig            Disabled
dhcp-rate-limit              Disabled
dtp-flap                     Disabled
evpn-mh-core-isolation       Disabled
gbic-invalid                 Disabled
inline-power                 Disabled
l2ptguard                    Disabled
link-flap                    Enabled
mac-limit                    Disabled
link-monitor-failure         Disabled
loopback                     Disabled
oam-remote-failure           Disabled
pagp-flap                    Disabled
port-mode-failure            Disabled
pppoe-ia-rate-limit          Disabled
psecure-violation            Disabled
security-violation           Disabled
sfp-config-mismatch          Disabled
storm-control                Disabled
udld                         Disabled
psp                          Disabled
dual-active-recovery         Disabled
evc-lite input mapping fa    Disabled
mrp-miscabling               Disabled

Timer interval: 300 seconds