troubleshoot and fix issue on LACP / BAGG

[tetzPeha]

Hi,

since few days, i have a physical link on BAGG who is flapping and i dont know why, and i dont know how to fix it. Atm, i shutdown the port to troubleshoot it, below the configuration of BAGG from the switch and from the other switch (it's a link between 2 switches) :

switch where i have the issue :

HP A5120-48G EI Switch - Comware Software, Version 5.20, Release 2208P01

interface Bridge-Aggregation1
 description .Interco Vers SWRI-001.
 port link-type trunk
 port trunk permit vlan 1 to 2 4 to 13 20 44 to 45 50 70 80 82 90 92
 port trunk permit vlan 100 120 to 121 150 to 151 200 210 224 232 to 233 301 to 303
 link-aggregation mode dynamic
 stp loop-protection

physical link with issue :

description Interco Vers SWRI-001
 port link-type trunk
 port trunk permit vlan 1 to 2 4 to 13 20 44 to 45 50 70 80 82 90 92
 port trunk permit vlan 100 120 to 121 150 to 151 200 210 224 232 to 233 301 to 303
 shutdown
 port link-aggregation group 1

physical link without issue :

interface GigabitEthernet1/0/48
 description Interco Vers SWRI-001
 port link-type trunk
 port trunk permit vlan 1 to 2 4 to 13 20 44 to 45 50 70 80 82 90 92
 port trunk permit vlan 100 120 to 121 150 to 151 200 210 224 232 to 233 301 to 303
 port link-aggregation group 1

dis link-aggregation verbose Bridge-Aggregation 1

Aggregation Interface: Bridge-Aggregation1
Aggregation Mode: Dynamic
Loadsharing Type: Shar
System ID: 0x8000, b8af-6711-8bbc
Local:
  Port             Status  Priority Oper-Key  Flag
--------------------------------------------------------------------------------
  GE1/0/47         U       32768    1         {ACGH}
  GE1/0/48         S       32768    1         {ACDEF}
Remote:
  Actor            Partner Priority Oper-Key  SystemID               Flag
--------------------------------------------------------------------------------
  GE1/0/47         0       32768    0         0x8000, 0000-0000-0000 {BEF}
  GE1/0/48         70      32768    10        0x8000, 001e-c1f6-f1b8 {ACDEF}

no CRC errors on physical link (1/0/47)

from the other side :

interface Bridge-Aggregation10
 description .Interco Vers SWRI-010.
 port link-type trunk
 port trunk permit vlan 1 to 2 4 to 13 20 44 to 45 50 70 80 82 90 92
 port trunk permit vlan 100 120 to 121 150 to 151 200 210 224 232 to 233 301 to 303
 link-aggregation mode dynamic
 stp root-protection

physical link with issue :

interface GigabitEthernet5/0/17
 port link-mode bridge
 description vers info-baie_10-10
 port link-type trunk
 port trunk permit vlan 1 to 2 4 to 13 20 44 to 45 50 70 80 82 90 92
 port trunk permit vlan 100 120 to 121 150 to 151 200 210 224 232 to 233 301 to 303
 shutdown
 broadcast-suppression 20
 multicast-suppression 20
 loopback-detection enable
 loopback-detection action shutdown
 port link-aggregation group 10

physical link without issue :

interface GigabitEthernet5/0/18
 port link-mode bridge
 port link-type trunk
 port trunk permit vlan 1 to 2 4 to 13 20 44 to 45 50 70 80 82 90 92
 port trunk permit vlan 100 120 to 121 150 to 151 200 210 224 232 to 233 301 to 303
 broadcast-suppression 20
 multicast-suppression 20
 loopback-detection enable
 loopback-detection action shutdown
 port link-aggregation group 10

dis link-aggregation verbose Bridge-Aggregation 10

Aggregation Interface: Bridge-Aggregation10
Aggregation Mode: Dynamic
Loadsharing Type: Shar
System ID: 0x8000, 001e-c1f6-f1b8
Local:
  Port             Status  Priority Oper-Key  Flag
--------------------------------------------------------------------------------
  GE5/0/17         U       32768    10        {ACGH}
  GE5/0/18         S       32768    10        {ACDEF}
Remote:
  Actor            Partner Priority Oper-Key  SystemID               Flag
--------------------------------------------------------------------------------
  GE5/0/17         0       32768    0         0x8000, 0000-0000-0000 {BEF}
  GE5/0/18         48      32768    1         0x8000, b8af-6711-8bbc {ACDEF}

thx for your help !

[parnassus]

Flapping...cabling issue between GE1/0/47 and GE5/0/17 ports? have you tried to change the GE5/0/17 with another port to see if the issue has a relationship with far end port or not?

---

tetzPeha wrote: switch where i have the issue :
HP A5120-48G EI Switch - Comware Software, Version 5.20, Release 2208P01

---

OK...HP A5120-48G EI Switch R2208P1 means November 2011...you're not running any recent release available since 2011 (actually there is R2222P08 of November 2017)...as first best practice one should avoid to run such old software in order to have a more consistent troubleshooting procedure.

What is the switch at other end (then GE5/0/17 naming looks strange for a single HP A5120-48G EI Switch, isn't it?)? is there an IRF on the other side?

What's about removing:

broadcast-suppression 20
multicast-suppression 20
loopback-detection enable
loopback-detection action shutdown

settings from both GE5/0/17 and GE5/0/18 interfaces in order to have both ports pairs (on both ends) configured equally?

I've doubt also about the fact that involved interfaces should have the same exact configuration...which above I don't see.

Something like:

#
interface GigabitEthernet1/0/x
 port link-mode bridge
 port link-type trunk
 port trunk permit vlan 1 2 4 to 13 20 44 45 50 70 80 82 90 92 100 120 121 150 151 200 210 224 232 233 301 302 303
 port link-aggregation group N
#

where x and N should be adapted accordingly on both ends.

Out of curiosity...what display stp brief reports on both ends?

[tetzPeha]

Hello,

i know about versionning on this switch (and many other). I said that when i joined the company 5 month ago. I tried to see every issue (miss configuration, bad configuration, old software).

About this switch, it's a "datacenter" switch so i cant "play" with it easily.

The other switch (the other side then) is the network core, 7506.

I will try to change the port and ill do a feedback after.

about dis stp :

on the switch :

dis stp brief
 MSTID      Port                         Role  STP State     Protection
   0        Bridge-Aggregation1          ROOT  FORWARDING    LOOP
   0        GigabitEthernet1/0/3         DESI  FORWARDING    BPDU
   0        GigabitEthernet1/0/15        DESI  FORWARDING    BPDU
   0        GigabitEthernet1/0/18        DESI  FORWARDING    BPDU
   0        GigabitEthernet1/0/21        DESI  FORWARDING    NONE
   0        GigabitEthernet1/0/22        DESI  FORWARDING    BPDU
   0        GigabitEthernet1/0/28        DESI  FORWARDING    BPDU
   0        GigabitEthernet1/0/30        DESI  FORWARDING    BPDU
   0        GigabitEthernet1/0/36        DESI  FORWARDING    BPDU
   0        GigabitEthernet1/0/40        DESI  FORWARDING    BPDU
   0        GigabitEthernet1/0/43        DESI  FORWARDING    BPDU

on the 7506 :

dis stp brief
 MSTID      Port                         Role  STP State     Protection
   0        Bridge-Aggregation2          DESI  FORWARDING    ROOT
   0        Bridge-Aggregation3          DESI  FORWARDING    ROOT
   0        Bridge-Aggregation4          DESI  FORWARDING    ROOT
   0        Bridge-Aggregation5          DESI  FORWARDING    ROOT
   0        Bridge-Aggregation6          DESI  FORWARDING    ROOT
   0        Bridge-Aggregation7          DESI  FORWARDING    ROOT
   0        Bridge-Aggregation8          DESI  FORWARDING    ROOT
   0        Bridge-Aggregation9          DESI  FORWARDING    ROOT
   0        Bridge-Aggregation10         DESI  FORWARDING    ROOT
   0        Bridge-Aggregation11         DESI  FORWARDING    ROOT
   0        Bridge-Aggregation12         DESI  FORWARDING    ROOT
   0        Bridge-Aggregation13         DESI  FORWARDING    ROOT
   0        Bridge-Aggregation14         DESI  FORWARDING    ROOT
   0        Bridge-Aggregation38         DESI  FORWARDING    ROOT
   0        Bridge-Aggregation39         DESI  FORWARDING    ROOT
   0        Bridge-Aggregation40         DESI  FORWARDING    ROOT
   0        GigabitEthernet3/0/1         DESI  FORWARDING    NONE
   0        GigabitEthernet3/0/2         DESI  FORWARDING    NONE
   0        GigabitEthernet3/0/3         DESI  FORWARDING    NONE
   0        GigabitEthernet3/0/5         DESI  FORWARDING    NONE
   0        GigabitEthernet3/0/6         DESI  FORWARDING    NONE
   0        GigabitEthernet3/0/7         DESI  FORWARDING    NONE
   0        GigabitEthernet3/0/8         DESI  FORWARDING    NONE
   0        GigabitEthernet4/0/1         DESI  FORWARDING    NONE
   0        GigabitEthernet4/0/2         DESI  FORWARDING    NONE
   0        GigabitEthernet4/0/3         DESI  FORWARDING    NONE
   0        GigabitEthernet4/0/4         DESI  FORWARDING    NONE
   0        GigabitEthernet4/0/5         DESI  FORWARDING    NONE
   0        GigabitEthernet4/0/6         DESI  FORWARDING    NONE
   0        GigabitEthernet4/0/7         DESI  FORWARDING    NONE
   0        GigabitEthernet4/0/22        DESI  FORWARDING    NONE
   0        GigabitEthernet5/0/24        DESI  FORWARDING    NONE
   0        GigabitEthernet5/0/27        DESI  FORWARDING    NONE
   0        GigabitEthernet5/0/29        DESI  FORWARDING    NONE
   0        GigabitEthernet5/0/30        DESI  FORWARDING    NONE
   0        GigabitEthernet5/0/33        DESI  FORWARDING    NONE
   0        GigabitEthernet5/0/39        DESI  FORWARDING    NONE
   0        GigabitEthernet5/0/41        DESI  FORWARDING    NONE
   0        GigabitEthernet5/0/43        DESI  FORWARDING    NONE
   0        GigabitEthernet5/0/44        DESI  FORWARDING    NONE
   0        GigabitEthernet5/0/45        DESI  FORWARDING    NONE
   0        GigabitEthernet5/0/47        DESI  FORWARDING    NONE
   0        GigabitEthernet5/0/48        DESI  FORWARDING    NONE
   0        Ten-GigabitEthernet2/0/1     DESI  FORWARDING    NONE
   0        Ten-GigabitEthernet7/0/2     DESI  FORWARDING    NONE
   0        Ten-GigabitEthernet7/0/8     DESI  FORWARDING    NONE

why should i need to remove the bdcast and mcast suppression ? do i need really need it everywhere ? (1st thing i see when i joined there, and i never use that on cisco's device)