проблема с BGP

[Road2CCIE]

Привет, Эта проблема в последнее время сводит меня с ума, поэтому я решил обратиться сюда в качестве последней инстанции. У меня следующая топология. R4 <----> R7. Оба подключены через одно Ethernet-соединение в EVE-NG. У меня есть образ i86bi_linux-adventerprisek9-ms.156-3.M3a.bin, но то же самое происходит с CSR csr1000vng-universalk9.16.06.05.Everest Я устанавливаю соединение между каждым loopback этих маршрутизаторов с EIGRP AS 47. После этого я запускаю eBGP между loopbacks (4.4.4.4 и 7.7.7.7, оба /24). Если я просто настраиваю eBGP и не объявляю ничего в BGP, соединение остается активным. Через несколько секунд после того, как я объявляю, скажем, один из лупбэков через eBGP, соседство прерывается. Ниже вы можете увидеть как логи, так и отладочную информацию. Хочу отметить, что таймеры одинаковы. Есть ли идеи, почему это происходит? Это из-за виртуализации? Или я что-то делаю не так? *Nov 3 11:47:31.560: BGP: ses global 7.7.7.7 (0xBB8143A8:1) Keep alive timer fired.
*Nov 3 11:47:31.560: BGP: 7.7.7.7 KEEPALIVE requested (bgp_keepalive_timer_expired)
*Nov 3 11:47:31.560: BGP: ses global 7.7.7.7 (0xBB8143A8:1) service keepalive IO request.
*Nov 3 11:47:31.560: BGP: 7.7.7.7 KEEPALIVE write request serviced in BGP_IO
R4#
*Nov 3 11:47:37.536: BGP: 7.7.7.7 received KEEPALIVE, length (excl. header) 0
R4#
*Nov 3 11:47:51.958: BGP: 7.7.7.7 rcv message type 3, length (excl. header) 2
*Nov 3 11:47:51.958: %BGP-3-NOTIFICATION: received from neighbor 7.7.7.7 4/0 (hold time expired) 0 bytes *Nov 3 11:47:51.958: BGP: ses global 7.7.7.7 (0xBB8143A8:1) Receive NOTIFICATION 4/0 (hold time expired) 0 bytes *Nov 3 11:47:51.958: %BGP-5-NBR_RESET: Neighbor 7.7.7.7 reset (BGP Notification received)
*Nov 3 11:47:51.958: BGP: ses global 7.7.7.7 (0xBB8143A8:1) Reset (BGP Notification received).
*Nov 3 11:47:51.958: BGP: 7.7.7.7 went from Established to Closing
*Nov 3 11:47:51.958: BGP: 7.7.7.7 reset due to BGP Notification received
*Nov 3 11:47:51.958: BGP: tbl IPv4 Unicast:base Service reset requests
*Nov 3 11:47:51.958: BGP: tbl IPv4 Multicast:base Service reset requests
*Nov 3 11:47:51.958: BGP: tbl L2VPN E-VPN:base Service reset requests
*Nov 3 11:47:51.958: BGP: tbl MVPNv4 Unicast:base Service reset requests
*Nov 3 11:47:51.958: BGP: nbr_topo global 7.7.7.7 IPv4 Unicast:base (0xBB8143A8:1) NSF delete stale NSF not active
*Nov 3 11:47:51.958: BGP: nbr_topo global 7.7.7.7 IPv4 Unicast:base (0xBB8143A8:1) NSF no stale paths state is NSF not active
*Nov 3 11:47:51.958: BGP: nbr_topo global 7.7.7.7 IPv4 Unicast:base (0xBB8143A8:1) Resetting ALL counters.
*Nov 3 11:47:51.958: BGP: 7.7.7.7 closing
*Nov 3 11:47:51.958: BGP: ses global 7.7.7.7 (0xBB8143A8:1) Session close and reset neighbor 7.7.7.7 topostate
*Nov 3 11:47:51.958: BGP: nbr_topo global 7.7.7.7 IPv4 Unicast:base (0xBB8143A8:1) Resetting ALL counters.
*Nov 3 11:47:51.958: BGP: 7.7.7.7 went from Closing to Idle
*Nov 3 11:47:51.958: %BGP-5-ADJCHANGE: neighbor 7.7.7.7 Down BGP Notification received
*Nov 3 11:47:51.958: %BGP_SESSION-5-ADJCHANGE: neighbor 7.7.7.7 IPv4 Unicast topology base removed from session BGP Notification received
*Nov 3 11:47:51.958: BGP: ses global 7.7.7.7 (0xBB8143A8:1) Removed topology IPv4 Unicast:base
*Nov 3 11:47:51.958: BGP: ses global 7.7.7.7 (0xBB8143A8:1) Removed last topology
*Nov 3 11:47:51.958: BGP: nbr global 7.7.7.7 Active open failed - route to peer is invalid
*Nov 3 11:47:51.958: BGP: nbr global 7.7.7.7 Active open failed - route to peer is invalid
*Nov 3 11:47:51.958: BGP: bgp_rwatch_notify: BGP_RWATCH_APPL_NHOP
*Nov 3 11:47:51.958: EvD: charge penalty 500, new accum. penalty 500, flap count 12
*Nov 3 11:47:51.958: BGP: bgp_rwatch_notify: BGP_RWATCH_APPL_NBR
*Nov 3 11:47:51.958: BGP: nbr global 7.7.7.7 bgp_process_bnbr_notification not reachable
*Nov 3 11:47:51.958: BGP: bgp_rwatch_notify: BGP_RWATCH_APPL_NHOP
*Nov 3 11:47:51.958: EvD: charge penalty 500, new accum. penalty 1000, flap count 13
*Nov 3 11:47:51.958: BGP: bgp_rwatch_notify: BGP_RWATCH_APPL_NBR
*Nov 3 11:47:51.958: BGP: nbr global 7.7.7.7 bgp_process_bnbr_notification reachable
*Nov 3 11:47:51.958: BGP: nbr global 7.7.7.7 Open active delayed 1024ms (0ms max, 60% jitter)
*Nov 3 11:47:52.142: BGP: 7.7.7.7 active went from Idle to Active
*Nov 3 11:47:52.142: BGP: 7.7.7.7 open active, local address 4.4.4.4
*Nov 3 11:47:52.143: BGP: ses global 7.7.7.7 (0xBBC7D948:0) act Adding topology IPv4 Unicast:base
*Nov 3 11:47:52.143: BGP: ses global 7.7.7.7 (0xBBC7D948:0) act Send OPEN
*Nov 3 11:47:52.143: BGP: ses global 7.7.7.7 (0xBBC7D948:0) act Building Enhanced Refresh capability
*Nov 3 11:47:52.143: BGP: 7.7.7.7 active went from Active to OpenSent
*Nov 3 11:47:52.143: BGP: 7.7.7.7 active sending OPEN, version 4, my as: 65019, holdtime 180 seconds, ID 4040404
*Nov 3 11:47:52.147: BGP: 7.7.7.7 active KEEPALIVE write request serviced in BGP_IO
*Nov 3 11:47:52.147: BGP: 7.7.7.7 active service 2 read request in BGP_IO
*Nov 3 11:47:52.148: BGP: 7.7.7.7 active KEEPALIVE write request serviced in BGP_IO
*Nov 3 11:47:52.148: BGP: 7.7.7.7 active service 2 read request in BGP_IO
*Nov 3 11:47:52.148: BGP: 7.7.7.7 active service 2 read request in BGP_IO
*Nov 3 11:47:52.148: BGP: 7.7.7.7 active rcv message type 1, length (excl. header) 38
*Nov 3 11:47:52.148: BGP: ses global 7.7.7.7 (0xBBC7D948:0) act Receive OPEN
*Nov 3 11:47:52.148: BGP: 7.7.7.7 active rcv OPEN, version 4, holdtime 180 seconds
*Nov 3 11:47:52.148: BGP: 7.7.7.7 active rcv OPEN w/ OPTION parameter len: 28
*Nov 3 11:47:52.148: BGP: 7.7.7.7 active rcvd OPEN w/ optional parameter type 2 (Capability) len 6
*Nov 3 11:47:52.148: BGP: 7.7.7.7 active OPEN has CAPABILITY code: 1, length 4
*Nov 3 11:47:52.148: BGP: 7.7.7.7 active OPEN has MP_EXT CAP for afi/safi: 1/1
*Nov 3 11:47:52.148: BGP: 7.7.7.7 active rcvd OPEN w/ optional parameter type 2 (Capability) len 2
*Nov 3 11:47:52.148: BGP: 7.7.7.7 active OPEN has CAPABILITY code: 128, length 0
*Nov 3 11:47:52.148: BGP: 7.7.7.7 active OPEN has ROUTE-REFRESH capability(old) for all address-families
*Nov 3 11:47:52.148: BGP: 7.7.7.7 active rcvd OPEN w/ optional parameter type 2 (Capability) len 2
*Nov 3 11:47:52.148: BGP: 7.7.7.7 active OPEN has CAPABILITY code: 2, length 0
*Nov 3 11:47:52.148: BGP: 7.7.7.7 active OPEN has ROUTE-REFRESH capability(new) for all address-families
*Nov 3 11:47:52.148: BGP: 7.7.7.7 active rcvd OPEN w/ optional parameter type 2 (Capability) len 2
*Nov 3 11:47:52.148: BGP: 7.7.7.7 active OPEN has CAPABILITY code: 70, length 0
*Nov 3 11:47:52.148: BGP: ses global 7.7.7.7 (0xBBC7D948:0) act Enhanced Refresh cap received in open message
*Nov 3 11:47:52.148: BGP: 7.7.7.7 active rcvd OPEN w/ optional parameter type 2 (Capability) len 6
*Nov 3 11:47:52.148: BGP: 7.7.7.7 active OPEN has CAPABILITY code: 65, length 4
*Nov 3 11:47:52.148: BGP: 7.7.7.7 active OPEN has 4-byte ASN CAP for: 7
*Nov 3 11:47:52.148: BGP: 7.7.7.7 active rcvd OPEN w/ remote AS 7, 4-byte remote AS 7
*Nov 3 11:47:52.148: BGP: 7.7.7.7 active KEEPALIVE requested (rcv_open)
*Nov 3 11:47:52.148: BGP: ses global 7.7.7.7 (0xBBC7D948:0) act service keepalive IO request.
*Nov 3 11:47:52.148: BGP: 7.7.7.7 active went from OpenSent to OpenConfirm
*Nov 3 11:47:52.148: BGP: 7.7.7.7 active received KEEPALIVE, length (excl. header) 0
*Nov 3 11:47:52.148: BGP: 7.7.7.7 active went from OpenConfirm to Established
*Nov 3 11:47:52.148: BGP: ses global 7.7.7.7 (0xBBC7D948:1) act Assigned ID
*Nov 3 11:47:52.148: BGP: ses global 7.7.7.7 (0xBBC7D948:1) Up
*Nov 3 11:47:52.148: BGP: nopeerup-delay post-boot, set to default, 60s
*Nov 3 11:47:52.148: %BGP-5-ADJCHANGE: neighbor 7.7.7.7 Up R4#
*Nov 3 11:47:52.148: BGP: 7.7.7.7 KEEPALIVE write request serviced in BGP_IO
*Nov 3 11:47:52.148: BGP: 7.7.7.7 service 1 read request in BGP_IO
*Nov 3 11:47:52.150: BGP: 7.7.7.7 KEEPALIVE requested (bgp_tx_converged)
*Nov 3 11:47:52.150: BGP: ses global 7.7.7.7 (0xBBC7D948:1) service keepalive IO request.
*Nov 3 11:47:52.150: BGP: 7.7.7.7 KEEPALIVE write request serviced in BGP_IO
*Nov 3 11:47:52.150: BGP: 7.7.7.7 received KEEPALIVE, length (excl. header) 0
R4#
*Nov 3 11:47:56.965: BGP_Router: unhandled major event code 128, minor 0
*Nov 3 11:47:56.965: BGP: bgp_rwatch_notify: BGP_RWATCH_APPL_NHOP
*Nov 3 11:47:56.965: EvD: charge penalty 500, new accum. penalty 1148, flap count 14
*Nov 3 11:47:56.965: BGP: bgp_rwatch_notify: BGP_RWATCH_APPL_NBR
*Nov 3 11:47:56.965: BGP: nbr global 7.7.7.7 bgp_process_bnbr_notification reachable
R4#
*Nov 3 11:48:01.727: BGP: Regular scanner timer event
*Nov 3 11:48:01.727: BGP: Performing BGP general scanning
*Nov 3 11:48:01.727: BGP: topo global:IPv4 Unicast:base Scanning routing tables
*Nov 3 11:48:01.727: BGP: tbl IPv4 Unicast:base Performing BGP Nexthop scanning for general scan
*Nov 3 11:48:01.727: BGP(0): Future scanner version: 30, current scanner version: 29
*Nov 3 11:48:01.727: BGP: topo global:IPv4 Multicast:base Scanning routing tables
*Nov 3 11:48:01.727: BGP: tbl IPv4 Multicast:base Performing BGP Nexthop scanning for general scan
*Nov 3 11:48:01.727: BGP(6): Future scanner version: 31, current scanner version: 30
R4#
*Nov 3 11:48:01.727: BGP: topo global:L2VPN E-VPN:base Scanning routing tables
*Nov 3 11:48:01.727: BGP: tbl L2VPN E-VPN:base Performing BGP Nexthop scanning for general scan
*Nov 3 11:48:01.727: BGP(10): Future scanner version: 31, current scanner version: 30
*Nov 3 11:48:01.727: BGP: topo global:MVPNv4 Unicast:base Scanning routing tables
*Nov 3 11:48:01.727: BGP: tbl MVPNv4 Unicast:base Performing BGP Nexthop scanning for general scan
*Nov 3 11:48:01.727: BGP(15): Future scanner version: 31, current scanner version: 30
R4#u all
All possible debugging has been turned off R4#
*Nov 3 11:38:48.286: %BGP-3-NOTIFICATION: received from neighbor 7.7.7.7 4/0 (hold time expired) 0 bytes R4#
*Nov 3 11:38:48.287: %BGP-5-NBR_RESET: Neighbor 7.7.7.7 reset (BGP Notification received)
*Nov 3 11:38:48.287: %BGP-5-ADJCHANGE: neighbor 7.7.7.7 Down BGP Notification received
*Nov 3 11:38:48.287: %BGP_SESSION-5-ADJCHANGE: neighbor 7.7.7.7 IPv4 Unicast topology base removed from session BGP Notification received
*Nov 3 11:38:48.592: %BGP-5-ADJCHANGE: neighbor 7.7.7.7 Up R4#
*Nov 3 11:38:53.305: %IPRT-3-RIB_LOOP: Resolution loop formed by routes in RIB
R4#
*Nov 3 11:41:49.500: %BGP-3-NOTIFICATION: received from neighbor 7.7.7.7 4/0 (hold time expired) 0 bytes R4#
*Nov 3 11:41:49.500: %BGP-5-NBR_RESET: Neighbor 7.7.7.7 reset (BGP Notification received)
*Nov 3 11:41:49.500: %BGP-5-ADJCHANGE: neighbor 7.7.7.7 Down BGP Notification received
*Nov 3 11:41:49.500: %BGP_SESSION-5-ADJCHANGE: neighbor 7.7.7.7 IPv4 Unicast topology base removed from session BGP Notification received
*Nov 3 11:41:49.798: %BGP-5-ADJCHANGE: neighbor 7.7.7.7 Up

[M02@rt37]

Привет
[, @Road2CCIE] Когда вы запускаете неблагоприятные префиксы через BGP-пиринг, маршрут к loopback соседа становится известным через BGP (или иным образом устанавливается в RIB, указывая обратно через соседа), поэтому маршрут ядра для достижения IP соседа теперь указывает на BGP, создавая рекурсию/цикл (см. сообщение RIB_LOOP). BGP обнаруживает, что маршрут к соседу недействителен (не может разрешить независимый следующий прыжок), поэтому он разрывает сессию (сообщение «маршрут к пирингу недействителен»). Чтобы проверить это самым простым способом, добавьте статический маршрут к петле соседа через физический IP соседа... или используйте прямой eBGP на физических IP, без петель. С уважением
.ı|ı.ı|ı. Если это помогло, пожалуйста, оцените.ı|ı.ı|ı.