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BGP ipv6 configuration on NE40E - V600R009C20SPC600
bgp 65005
ipv6-family
vpn-instance INTERNET
peer 2020:2020:XXXX:A::1 as-number 65000
peer 2020:2020:XXXX:A::1 timer keepalive 10 hold 180
peer 2020:2020:XXXX:A::1 route-policy RP-BGP-v6-INEA-1 import
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Huawei Physical interface:GigabitEthernet1/1/4 current state : UP
Line protocol current state : DOWN
Link quality grade : GOOD
Description:HUAWEI, GigabitEthernet1/1/4 Interface
Route Port,The Maximum Transmit Unit is 1500
Huawei Subinterface:
GigabitEthernet1/1/4.10 current state : UP
Line protocol current state : UP
Last line protocol up time : 2017-11-27 00:19 UTC+01:00
Link quality grade : GOOD
Description:HUAWEI, GigabitEthernet1/1/4.10 Interface
Route Port,The Maximum Transmit Unit is 1500
BGP Session flapping in the logs:
%BGP/3/STATE_CHG_UPDOWN(l)[18]:The status of the peer
2020:2020:XXXX:A::1 changed from ESTABLISHED to IDLE. (InstanceName=INTERNET,
StateChangeReason=Hold Timer Expired)
%BGP/3/STATE_CHG_UPDOWN(l)[19]:The status of the peer
2020:2020:XXXX:A::1 changed from OPENCONFIRM to ESTABLISHED.
(InstanceName=INTERNET, StateChangeReason=Up)
%BGP/3/STATE_CHG_UPDOWN(l)[22]:The status of the peer
2020:2020:XXXX:A::1 changed from ESTABLISHED to IDLE. (InstanceName=INTERNET,
StateChangeReason=Hold Timer Expired)
%BGP/3/STATE_CHG_UPDOWN(l)[24]:The status of the peer
2020:2020:XXXX:A::1 changed from OPENCONFIRM to ESTABLISHED.
(InstanceName=INTERNET, StateChangeReason=Up)
%BGP/3/STATE_CHG_UPDOWN(l)[26]:The status of the peer
2020:2020:XXXX:A::1 changed from ESTABLISHED to IDLE. (InstanceName=INTERNET,
StateChangeReason=Hold Timer Expired)
%BGP/3/STATE_CHG_UPDOWN(l)[28]:The status of the peer
2020:2020:XXXX:A::1 changed from OPENCONFIRM to ESTABLISHED.
(InstanceName=INTERNET, StateChangeReason=Up)
Handling Process[NE40E]displ bgp vpnv6 vpn-instance INTERNET peer 2020:2020:XXXX:A::1 verbose
BGP Peer is 2020:2020:XXXX:A::1, remote AS 65000
Type: EBGP link
BGP version 4,Remote router ID 10.253.33.100
Update-group ID: 1
BGP current state: Established, Up for 00h01m01s
BGP current event: KATimerExpired
BGP last state: OpenConfirm
BGP Peer Up count: 64
juniper@juniper> show bgp neighbor 2020:2020:XXXX:A::2
Peer: 2020:2020:XXXX:A::2+49287 AS 65005 Local:
2020:2020:XXXX:A::1+179 AS 65000
Description: IDC-v6-TESTY
Type: External State: Established Flags: <WriteActive>
Last State: OpenConfirm
Last Event: RecvKeepAlive
Last Error: Hold Timer Expired Error
Export: [ ipv6-route-filter ] Import: [ IDC-bgp-v6-in ]
Options:
< Preference LogUpDown AddressFamily PeerAS Refresh>
Options: <MtuDiscovery>
Address families configured: inet6-unicast
Holdtime: 90
Preference: 170
Number of flaps: 109
Logs from Juniper:
juniper: bgp_read_v4_message:10805: NOTIFICATION received
from 2020:2020:XXXX:A::2 (External AS 65005): code 4 (Hold Timer Expired
Error), socket buffer sndcc: 16255 rcvcc: 0 TCP state: 4, snd_una: 3747744809
snd_nxt: 3747747785 snd_wnd: 32768 rcv_nxt: 737110738 rcv_adv: 737127122, hold
timer out 90s, hold timer remain 59.998002s
juniper: RPD_BGP_NEIGHBOR_STATE_CHANGED: BGP peer
2020:2020:XXXX:A::2 (External AS 65005) changed state from Established to Idle
(event RecvNotify) (instance master)
juniper: RPD_BGP_NEIGHBOR_STATE_CHANGED: BGP peer
2020:2020:XXXX:A::2 (External AS 65005) changed state from OpenConfirm to
Established (event RecvKeepAlive) (instance master)
juniper: bgp_read_v4_message:10805: NOTIFICATION received
from 2020:2020:XXXX:A::2 (External AS 65005): code 4 (Hold Timer Expired
Error), socket buffer sndcc: 16273 rcvcc: 0 TCP state: 4, snd_una: 2817548179
snd_nxt: 2817551155 snd_wnd: 32768 rcv_nxt: 2609362903 rcv_adv: 2609379266,
hold timer out 90s, hold timer remain 59.879083s
juniper: RPD_BGP_NEIGHBOR_STATE_CHANGED: BGP peer
2020:2020:XXXX:A::2 (External AS 65005) changed state from Established to Idle
(event RecvNotify) (instance master)
juniper: RPD_BGP_NEIGHBOR_STATE_CHANGED: BGP peer
2020:2020:XXXX:A::2 (External AS 65005) changed state from OpenConfirm to
Established (event RecvKeepAlive) (instance master)
Juniper has not reported hold timer expired.
Huawei is reporting to juniper: : NOTIFICATION received from
2020:2020:XXXX:A::2 (External AS 65005): code 4 (Hold Timer Expired Error)
The physical interface on juniper:
juniper@juniper> show interfaces ae3
Physical interface: ae3, Enabled, Physical link is Up
Interface index: 131, SNMP ifIndex: 510
Description: [m0] huawei
Link-level type: Flexible-Ethernet, MTU: 9192, Speed: 10Gbps,
BPDU Error: None, MAC-REWRITE Error: None, Loopback: Disabled, Source
filtering: Disabled,
Flow control: Disabled
Pad to minimum frame size: Disabled
Minimum links needed: 1, Minimum bandwidth needed: 1bps
Device flags : Present Running
Interface flags: SNMP-Traps Internal: 0x4000
Current address: 88:a2:5e:37:b7:c3, Hardware address: 88:a2:5e:37:b7:c3
Last flapped : 2017-11-27 00:19 CEST (17w3d 12:38 ago)
Input rate : 4208240 bps (2021 pps)
Output rate : 12120640 bps (1905 pps)
Sub-interface:
juniper@juniper> show interfaces ae3.240
Logical interface ae3.240 (Index 485) (SNMP ifIndex 718)
Description: juniper
Flags: Up SNMP-Traps 0x4000
VLAN-Tag [ 0x8100.240 ]
Encapsulation: ENET2
Statistics Packets pps Bytes bps
Bundle:
Input : 16236272 4
2649032673 2344
Output: 15120248 1
2161361040 8376
Adaptive
Statistics:
Adaptive
Adjusts: 0
Adaptive
Scans : 0
Adaptive Updates: 0
Protocol inet, MTU: 9170
Flags:
Sendbcast-pkt-to-re
Addresses,
Flags: Is-Preferred Is-Primary
Destination:
192.168.0.0/30, Local: 192.168.0.1, Broadcast: 192.168.0.3
Protocol inet6, MTU: 9170
Addresses, Flags: Is-Preferred Is-Primary
Destination: 2020:2020:XXXX:A::/64, Local: 2020:2020:XXXX:A::1
Addresses,Flags: Is-Preferred
Destination:fe80::/64, Local: fe80::8aa2:5e00:f037:b7c3
Protocol multiservice, MTU: Unlimited
SolutionChanged the MTU to 1500bytes to
match the Huawei side:
GigabitEthernet1/1/4.10 current state : UP
Line protocol current state : UP
Last line protocol up time : 2017-11-27 00:19
UTC+01:00
Link quality grade : GOOD
Description:HUAWEI, GigabitEthernet1/1/4.10
Interface
Route Port,The Maximum Transmit Unit is 1500
After BGP session came UP and no more BGP session flapping
issue anymore.
