08-19-2024 04:02 AM
Hi router A announce prefix x.x.x.x/y to routerB on IBGP
router B IS asr1002X by donnot redistruited prefix x.x.x.x/y To uplink internet bgp session
Router is exsited in routing table router A by IBGp distance 200
uplink internet advertise routes limit by prefix-list and in prefix-list x.x.x.x/y exsited
How solve this ????
any idea?
Solved! Go to Solution.
08-20-2024 02:25 AM - edited 08-26-2024 09:53 AM
MHM
08-20-2024 02:34 AM
ip prefix-list mobin:
count: 2, range entries: 2, sequences: 5 - 1000, refcount: 5
seq 5 permit 45.129.36.0/24 le 32 (hit count: 2, refcount: 1)
seq 1000 deny 0.0.0.0/0 le 32 (hit count: 0, refcount: 1)
ASR1002X-Sepehr#show ip bgp
ASR1002X-Sepehr#show ip bgp 45.129.36.0/24
BGP routing table entry for 45.129.36.0/24, version 2
Paths: (1 available, best #1, table default)
Not advertised to any peer
Refresh Epoch 1
208555 51026, (received & used)
172.18.22.22 from 172.18.22.22 (185.217.6.50)
Origin IGP, localpref 100, valid, internal, best
rx pathid: 0, tx pathid: 0x0
Updated on Aug 20 2024 07:01:45 UTC
08-20-2024 02:44 AM - edited 08-26-2024 09:53 AM
MHM
08-20-2024 02:51 AM
bgp is up
172.18.14.253 4 204203 171 187 10731 0 0 02:47:16
08-20-2024 02:35 AM
IOS version IS
System image file is "bootflash:/asr1002x-universalk9_noli.17.09.05a.SPA.bin"
08-20-2024 03:09 AM
BGP MSS 1460: IS true?
do you want decrease it
I can ping 172.18.14.253 df-bit size 1500
08-20-2024 03:11 AM
show ip bgp neighbors 172.18.14.253
BGP neighbor is 172.18.14.253, remote AS 204203, internal link
BGP version 4, remote router ID 185.217.6.1
BGP state = Established, up for 03:07:31
Last read 00:00:26, last write 00:00:34, hold time is 180, keepalive interval is 60 seconds
Last update received: 03:07:26
Neighbor sessions:
1 active, is not multisession capable (disabled)
Neighbor capabilities:
Route refresh: advertised and received(new)
Four-octets ASN Capability: advertised and received
Address family IPv4 Unicast: advertised and received
Graceful Restart Capability: received
Remote Restart timer is 120 seconds
Address families advertised by peer:
IPv4 Unicast (was not preserved)
Enhanced Refresh Capability: advertised
Extended Next Hop Encoding Capability:
IPv4 Unicast: received
VPNv4 Unicast: received
Multisession Capability:
Stateful switchover support enabled: NO for session 1
Message statistics:
InQ depth is 0
OutQ depth is 0
Sent Rcvd
Opens: 1 1
Notifications: 0 0
Updates: 1 1
Keepalives: 207 189
Route Refresh: 0 0
Total: 209 191
Do log neighbor state changes (via global configuration)
Default minimum time between advertisement runs is 0 seconds
For address family: IPv4 Unicast
Session: 172.18.14.253
BGP table version 11011, neighbor version 11011/0
Output queue size : 0
Index 2, Advertise bit 1
2 update-group member
NEXT_HOP is always this router for eBGP paths
Outbound path policy configured
Route map for outgoing advertisements is edge
Slow-peer detection is disabled
Slow-peer split-update-group dynamic is disabled
Sent Rcvd
Prefix activity: ---- ----
Prefixes Current: 0 0
Prefixes Total: 0 0
Implicit Withdraw: 0 0
Explicit Withdraw: 0 0
Used as bestpath: n/a 0
Used as multipath: n/a 0
Used as secondary: n/a 0
Outbound Inbound
Local Policy Denied Prefixes: -------- -------
Bestpath from iBGP peer: 25 n/a
Other Policies: 48804 n/a
Total: 48829 0
Number of NLRIs in the update sent: max 0, min 0
Last detected as dynamic slow peer: never
Dynamic slow peer recovered: never
Refresh Epoch: 1
Last Sent Refresh Start-of-rib: never
Last Sent Refresh End-of-rib: never
Last Received Refresh Start-of-rib: never
Last Received Refresh End-of-rib: never
Sent Rcvd
Refresh activity: ---- ----
Refresh Start-of-RIB 0 0
Refresh End-of-RIB 0 0
Address tracking is enabled, the RIB does have a route to 172.18.14.253
Route to peer address reachability Up: 1; Down: 0
Last notification 03:08:25
Connections established 1; dropped 0
Last reset never
Interface associated: (none) (peering address in same link)
Transport(tcp) path-mtu-discovery is disabled
Graceful-Restart is disabled
SSO is disabled
Connection state is ESTAB, I/O status: 1, unread input bytes: 0
Connection is ECN Disabled, Mininum incoming TTL 0, Outgoing TTL 255
Local host: 172.18.14.254, Local port: 52549
Foreign host: 172.18.14.253, Foreign port: 179
Connection tableid (VRF): 0
Maximum output segment queue size: 50
Enqueued packets for retransmit: 0, input: 0 mis-ordered: 0 (0 bytes)
Event Timers (current time is 0xB0A979):
Timer Starts Wakeups Next
Retrans 210 0 0x0
TimeWait 0 0 0x0
AckHold 191 185 0x0
SendWnd 0 0 0x0
KeepAlive 0 0 0x0
GiveUp 0 0 0x0
PmtuAger 8614 8614 0x0
DeadWait 0 0 0x0
Linger 0 0 0x0
ProcessQ 0 0 0x0
iss: 2977343209 snduna: 2977347223 sndnxt: 2977347223
irs: 630247311 rcvnxt: 630251002
sndwnd: 65535 scale: 0 maxrcvwnd: 16384
rcvwnd: 15624 scale: 0 delrcvwnd: 760
SRTT: 1000 ms, RTTO: 1003 ms, RTV: 3 ms, KRTT: 0 ms
minRTT: 0 ms, maxRTT: 1000 ms, ACK hold: 200 ms
uptime: 11255603 ms, Sent idletime: 30608 ms, Receive idletime: 30808 ms
Status Flags: active open
Option Flags: nagle, path mtu capable
IP Precedence value : 6
Window update Optimisation : Disabled
ACK Optimisation : Disabled
Datagrams (max data segment is 1460 bytes):
Peer MSS: 1460
Rcvd: 400 (out of order: 0), with data: 190, total data bytes: 3690
Sent: 398 (retransmit: 0, fastretransmit: 0, partialack: 0, Second Congestion: 0), with data: 209, total data bytes: 4013
Packets received in fast path: 0, fast processed: 0, slow path: 0
fast lock acquisition failures: 0, slow path: 0
TCP Semaphore 0x7F2EF7829338 FREE
08-20-2024 03:25 AM - edited 08-26-2024 09:53 AM
MHM
08-20-2024 05:13 AM
Ok IBGP i add Redistruted-internal in address-family and in uplink block announce any prefix to router B
But Router B still donnot announce any prefix to uplink uplink also have AS 204203
08-20-2024 06:14 AM - edited 08-26-2024 09:54 AM
Really I waste my time here
MHM
08-20-2024 06:17 AM
Hello admin@atrinnet.net ,
iBGP means that the peer is in the same AS as the device that originated the prefix.
Two options here or you make Router B the route reflector server or you create a direct iBGP session between RA and RC
Hope to help
Giuseppe
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