[FROG] FRR - Route-Server / IPv6 error

Wed Jan 30 03:43:14 EST 2019

Hello all,

We have setup successfully FRR as route server (IPv4) with multiple PEER
(Cisco ASR), and we are happy with the first part of the configuration.

When we try to configure the same with IPv6, we have multiple problem, and
the BGP session is always reset. 

Our setup :

-          CISCO ASR IOS-XE 16.1 and IOS-XE 15.4

-          Physical server with Bond interface (2 x 10Gbps SFP+) and 1 UTP
(for management purpose).

-          Private AS for the route-server

-          Public AS for all other router

Purpose of this setup :

-          All router will announce his own learned BGP route to the RS

-          The RS will redistribute one FULL table to all router.

Configuration on FRR (IP add and router-ID was changed:

router bgp 65129 view rs

bgp router-id 192.168.1.16

bgp log-neighbor-changes

neighbor 2001:db8::2 remote-as 60129

neighbor 2001:db8::2 interface br0

neighbor 2001:db8::2 update-source br0

!

address-family ipv6 unicast

  neighbor 2001:db8::2 activate

  neighbor 2001:db8::2 as-override

  neighbor 2001:db8::2 soft-reconfiguration inbound

  neighbor 2001:db8::2 route-server-client

exit-address-family

Configuration on PEER (IP add and router-ID was changed:

router bgp 60129

bgp router-id 192.168.0.2

no bgp enforce-first-as

bgp log-neighbor-changes

neighbor 2001:db8::16 remote-as 65129

neighbor 2001:db8::16 update-source Port-channel5.210

!

address-family ipv6

  neighbor 2001:db8::16 activate

  neighbor 2001:db8::16 next-hop-self

  neighbor 2001:db8::16 allowas-in

  neighbor 2001:db8::16 soft-reconfiguration inbound

exit-address-family

!

Debug Log of FRR (real IPv6 was changed ):

2019/01/30 08:31:50 BGP: u7:s5 add peer 2001:db8::2

2019/01/30 08:31:50 BGP: 2001:db8::2: Interface not set appropriately to
handle this some attributes

2019/01/30 08:31:50 BGP: 2001:db8::2: Attribute MP_REACH_NLRI, parse error -
treating as withdrawal

2019/01/30 08:31:50 BGP: 2001:db8::2 rcvd UPDATE with errors in attr(s)!!
Withdrawing route.

2019/01/30 08:31:50 BGP: 2001:db8::2 [Error] Update packet error (wrong
prefix length 64 for afi 1)

2019/01/30 08:31:50 BGP: 2001:db8::2 [Error] Error parsing NLRI

2019/01/30 08:31:50 BGP: %NOTIFICATION: sent to neighbor 2001:db8::2 3/10
(UPDATE Message Error/Invalid Network Field) 0 bytes

2019/01/30 08:31:50 BGP: bgp_process_packet: BGP UPDATE receipt failed for
peer: 2001:db8::2

2019/01/30 08:31:50 BGP: %ADJCHANGE: neighbor 2001:db8::2(Unknown) in vrf
Down BGP Notification send

2019/01/30 08:31:50 BGP: 2001:db8::2 remove from all update group

2019/01/30 08:32:02 BGP: bind to interface br0 failed, errno=1

2019/01/30 08:32:02 BGP: 2001:db8::2 unrecognized capability code: 70 -
ignored

2019/01/30 08:32:02 BGP: %ADJCHANGE: neighbor 2001:db8::2(Unknown) in vrf
Up

2019/01/30 08:32:02 BGP: u7:s5 add peer 2001:db8::2

2019/01/30 08:32:02 BGP: 2001:db8::2: Interface not set appropriately to
handle this some attributes

2019/01/30 08:32:02 BGP: 2001:db8::2: Attribute MP_REACH_NLRI, parse error -
treating as withdrawal

2019/01/30 08:32:02 BGP: 2001:db8::2 rcvd UPDATE with errors in attr(s)!!
Withdrawing route.

2019/01/30 08:32:02 BGP: 2001:db8::2 [Error] Update packet error (wrong
prefix length 64 for afi 1)

2019/01/30 08:32:02 BGP: 2001:db8::2 [Error] Error parsing NLRI

2019/01/30 08:32:02 BGP: %NOTIFICATION: sent to neighbor 2001:db8::2 3/10
(UPDATE Message Error/Invalid Network Field) 0 bytes

2019/01/30 08:32:02 BGP: bgp_process_packet: BGP UPDATE receipt failed for
peer: 2001:db8::2

2019/01/30 08:32:02 BGP: %ADJCHANGE: neighbor 2001:db8::2(Unknown) in vrf
Down BGP Notification send

2019/01/30 08:32:02 BGP: 2001:db8::2 remove from all update group

2019/01/30 08:32:09 BGP: bind to interface br0 failed, errno=1

2019/01/30 08:32:09 BGP: 2001:db8::2 unrecognized capability code: 70 -
ignored

2019/01/30 08:32:09 BGP: %ADJCHANGE: neighbor 2001:db8::2(Unknown) in vrf
Up

2019/01/30 08:32:09 BGP: u7:s5 add peer 2001:db8::2

2019/01/30 08:32:09 BGP: 2001:db8::2: Interface not set appropriately to
handle this some attributes

2019/01/30 08:32:09 BGP: 2001:db8::2: Attribute MP_REACH_NLRI, parse error -
treating as withdrawal

2019/01/30 08:32:09 BGP: 2001:db8::2 rcvd UPDATE with errors in attr(s)!!
Withdrawing route.

2019/01/30 08:32:09 BGP: 2001:db8::2 [Error] Update packet error (wrong
prefix length 64 for afi 1)

2019/01/30 08:32:09 BGP: 2001:db8::2 [Error] Error parsing NLRI

2019/01/30 08:32:09 BGP: %NOTIFICATION: sent to neighbor 2001:db8::2 3/10
(UPDATE Message Error/Invalid Network Field) 0 bytes

2019/01/30 08:32:09 BGP: bgp_process_packet: BGP UPDATE receipt failed for
peer: 2001:db8::2

2019/01/30 08:32:09 BGP: %ADJCHANGE: neighbor 2001:db8::2(Unknown) in vrf
Down BGP Notification send

2019/01/30 08:32:09 BGP: 2001:db8::2 remove from all update group

Debug log from 1 PEER :

Jan 30 08:34:08.582: BGP: nbr global 2001:db8::16 Open active delayed 9216ms
(35000ms max, 60% jitter)

Jan 30 08:34:08.583: BGP: nbr global 2001:db8::16 Active open failed - open
timer running

Jan 30 08:34:17.773: BGP: 2001:db8::16 active went from Idle to Active

Jan 30 08:34:17.773: BGP: 2001:db8::16 open active, local address
2A02:4FE0::2

Jan 30 08:34:17.774: BGP: ses global 2001:db8::16 (0x7F2DB7BC45C8:0) act
Adding topology IPv6 Unicast:base

Jan 30 08:34:17.774: BGP: ses global 2001:db8::16 (0x7F2DB7BC45C8:0) act
Send OPEN

Jan 30 08:34:17.774: BGP: ses global 2001:db8::16 (0x7F2DB7BC45C8:0) act
Building Enhanced Refresh capability

Jan 30 08:34:17.774: BGP: 2001:db8::16 active went from Active to OpenSent

Jan 30 08:34:17.774: BGP: 2001:db8::16 active sending OPEN, version 4, my
as: 60129, holdtime 180 seconds, ID B9381902

Jan 30 08:34:17.774: BGP: 2001:db8::16 active rcv message type 1, length
(excl. header) 70

Jan 30 08:34:17.774: BGP: ses global 2001:db8::16 (0x7F2DB7BC45C8:0) act
Receive OPEN

Jan 30 08:34:17.774: BGP: 2001:db8::16 active rcv OPEN, version 4, holdtime
180 seconds

Jan 30 08:34:17.774: BGP: 2001:db8::16 active rcv OPEN w/ OPTION parameter
len: 60

Jan 30 08:34:17.774: BGP: 2001:db8::16 active rcvd OPEN w/ optional
parameter type 2 (Capability) len 6

Jan 30 08:34:17.774: BGP: 2001:db8::16 active OPEN has CAPABILITY code: 1,
length 4

Jan 30 08:34:17.774: BGP: 2001:db8::16 active OPEN has MP_EXT CAP for
afi/safi: 1/1

Jan 30 08:34:17.774: BGP: 2001:db8::16 active rcvd OPEN w/ optional
parameter type 2 (Capability) len 6

Jan 30 08:34:17.774: BGP: 2001:db8::16 active OPEN has CAPABILITY code: 1,
length 4

Jan 30 08:34:17.774: BGP: 2001:db8::16 active OPEN has MP_EXT CAP for
afi/safi: 2/1

Jan 30 08:34:17.774: BGP: 2001:db8::16 active rcvd OPEN w/ optional
parameter type 2 (Capability) len 2

Jan 30 08:34:17.774: BGP: 2001:db8::16 active OPEN has CAPABILITY code: 128,
length 0

Jan 30 08:34:17.774: BGP: 2001:db8::16 active OPEN has ROUTE-REFRESH
capability(old) for all address-families

Jan 30 08:34:17.774: BGP: 2001:db8::16 active rcvd OPEN w/ optional
parameter type 2 (Capability) len 2

Jan 30 08:34:17.774: BGP: 2001:db8::16 active OPEN has CAPABILITY code: 2,
length 0

Jan 30 08:34:17.774: BGP: 2001:db8::16 active OPEN has ROUTE-REFRESH
capability(new) for all address-families

Jan 30 08:34:17.774: BGP: 2001:db8::16 active rcvd OPEN w/ optional
parameter type 2 (Capability) len 6

Jan 30 08:34:17.774: BGP: 2001:db8::16 active OPEN has CAPABILITY code: 65,
length 4

Jan 30 08:34:17.774: BGP: 2001:db8::16 active OPEN has 4-byte ASN CAP for:
65129

Jan 30 08:34:17.774: BGP: 2001:db8::16 active rcvd OPEN w/ optional
parameter type 2 (Capability) len 10

Jan 30 08:34:17.774: BGP: 2001:db8::16 active OPEN has CAPABILITY code: 69,
length 8

Jan 30 08:34:17.774: BGP: ses global 2001:db8::16 (0x7F2DB7BC45C8:0) act Add
Path not supported for EBGP nbr 2001:db8::16.

Jan 30 08:34:17.774: BGP: 2001:db8::16 active rcvd OPEN w/ optional
parameter type 2 (Capability) len 8

Jan 30 08:34:17.774: BGP: 2001:db8::16 active OPEN has CAPABILITY code: 73,
length 6

Jan 30 08:34:17.774: BGP: 2001:db8::16 active unrecognized capability code:
73 - ingored

Jan 30 08:34:17.774: BGP: 2001:db8::16 active rcvd OPEN w/ optional
parameter type 2 (Capability) len 4

Jan 30 08:34:17.774: BGP: 2001:db8::16 active OPEN has CAPABILITY code: 64,
length 2

Jan 30 08:34:17.774: BGP: ses global 2001:db8::16 (0x7F2DB7BC45C8:0) act NSF
OPEN has GR cap

Jan 30 08:34:17.774: BGP: ses global 2001:db8::16 (0x7F2DB7BC45C8:0) act NSF
Peer has not restarted. Restart Time: 120

Jan 30 08:34:17.774: BGP: nbr global 2001:db8::16 neighbor does not have
IPv4 MDT topology activated

Jan 30 08:34:17.774: BGP: 2001:db8::16 active rcvd OPEN w/ remote AS 65129,
4-byte remote AS 65129

Jan 30 08:34:17.774: BGP: ses global 2001:db8::16 (0x7F2DB7BC45C8:0) act
Peer sent not matching OPEN AFCAP 0

Jan 30 08:34:17.774: BGP: 2001:db8::16 active went from OpenSent to
OpenConfirm

Jan 30 08:34:17.775: BGP: 2001:db8::16 active went from OpenConfirm to
Established

Jan 30 08:34:17.775: BGP: ses global 2001:db8::16 (0x7F2DB7BC45C8:1) act
Assigned ID

Jan 30 08:34:17.775: BGP: ses global 2001:db8::16 (0x7F2DB7BC45C8:1) Up

Jan 30 08:34:17.775: %BGP-5-ADJCHANGE: neighbor 2001:db8::16 Up

Jan 30 08:34:17.801: BGP: ses global 2001:db8::16 (0x7F2DB7BC45C8:1) Remote
close.

Jan 30 08:34:17.801: BGP: nbr_topo global 2001:db8::16 IPv6 Unicast:base
(0x7F2DB7BC45C8:1) Not scheduling for GR processing [Peer did not advertise
GR cap]

Jan 30 08:34:17.801: %BGP-5-NBR_RESET: Neighbor 2001:db8::16 reset (Peer
closed the session)

Jan 30 08:34:17.801: BGP: ses global 2001:db8::16 (0x7F2DB7BC45C8:1) Reset
(Peer closed the session).

Jan 30 08:34:17.801: BGP: nbr_topo global 2001:db8::16 IPv6 Unicast:base
(0x7F2DB7BC45C8:1) NSF delete stale NSF not active

Jan 30 08:34:17.801: BGP: nbr_topo global 2001:db8::16 IPv6 Unicast:base
(0x7F2DB7BC45C8:1) NSF no stale paths state is NSF not active

Jan 30 08:34:17.802: BGP: nbr_topo global 2001:db8::16 IPv6 Unicast:base
(0x7F2DB7BC45C8:1) Resetting ALL counters.

Jan 30 08:34:17.802: BGP: 2001:db8::16 rcv message type 3, length (excl.
header) 2

Jan 30 08:34:17.802: %BGP-3-NOTIFICATION: received from neighbor
2001:db8::16 3/10 (illegal network) 0 bytes

Jan 30 08:34:17.802: BGP: ses global 2001:db8::16 (0x7F2DB7BC45C8:1) Receive
NOTIFICATION 3/10 (illegal network) 0 bytes

Jan 30 08:34:17.802: BGP: 2001:db8::16 went from Established to Closing

Jan 30 08:34:17.802: %BGP_SESSION-5-ADJCHANGE: neighbor 2001:db8::16 IPv6
Unicast topology base removed from session  Peer closed the session

Jan 30 08:34:17.802: BGP: ses global 2001:db8::16 (0x7F2DB7BC45C8:1) Removed
topology IPv6 Unicast:base

Jan 30 08:34:17.802: BGP: ses global 2001:db8::16 (0x7F2DB7BC45C8:1) Removed
last topology

Jan 30 08:34:17.802: BGP: 2001:db8::16 closing

Jan 30 08:34:17.802: BGP: 2001:db8::16 went from Closing to Idle

Jan 30 08:34:17.802: %BGP-5-ADJCHANGE: neighbor 2001:db8::16 Down Peer
closed the session

Any help or comment will be very appreciated.

Thanks in advance,

Rémy

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