11-07-2022 01:38 AM - last edited on 12-07-2022 11:04 PM by Translator
i wanted to perform a swap of my BGP router i.e from ASR-1001 to ASR-1001-X. since this is a swap all configuration remained the same, nothing changed. when i plugged in the new router by e-BGP was not coming up. i was getting the below error message
BGP-4-MSGDUMP: unsupported or mal-formatted message received from x.x.x.x:
FFFF FFFF FFFF FFFF FFFF FFFF FFFF FFFF 0055 0104 3DBA 00B4 0A2C 110F 3802 0601
0400 0100 0102 0280 0002 0202 0002 0641 0400 003D BA02 0840 0600 7800 0101 0002
1405 1200 0100 0100 0200 0100 0200 0200 0100 8000 02
below is the BGP config which i have
router bgp zzzzz
bgp router-id 10.254.3.1
bgp always-compare-med
bgp log-neighbor-changes
bgp deterministic-med
neighbor 10.254.3.2 remote-as zzzzz
neighbor 10.254.3.2 update-source Loopback0
neighbor x.x.x.x remote-as 15802
neighbor x.x.x.x dont-capability-negotiate
!
address-family ipv4
bgp dampening
network y.y.y.y mask 255.255.255.0
network y.y.x.x mask 255.255.252.0
neighbor 10.254.3.2 activate
neighbor 10.254.3.2 next-hop-self
neighbor x.x.x.x activate
neighbor x.x.x.x soft-reconfiguration inbound
neighbor x.x.x.x route-map LOCAL-PREF in
neighbor x.x.x.x route-map PREPEND out
exit-address-family
the other party is a bit difficult to deal with, so if i can do anything to resolve this issue on my end it would be great if i can get pointers.
Solved! Go to Solution.
11-28-2022 09:44 AM
sorry I can not open link.
can you share it again
11-28-2022 09:49 AM
Hi @MHM Cisco World ,
You should be able to open it if you have a CCO account.
Regards,
11-30-2022 05:23 AM
when i try to access the link i get the below error in the screenshot.
11-30-2022 05:47 AM - edited 11-30-2022 05:49 AM
Hi @promise2k ,
The best way to handle the issue would be to contact TAC, mention that you might be running into CSCva92216 so they can recommend a software upgrade path.
Regards,
11-08-2022 12:38 AM - last edited on 12-09-2022 02:11 AM by Translator
Hello
@promise2k wrote:
when i plugged in the new router by e-BGP was not coming up. i was getting the below error message
Your oun ASN is 15802 and its looks like you are ibgp peering twice, so you have no EBGP peering set:
OPEN Message result
Marker: 16 bytes
Length: 85 bytes : 0055
Type: OPEN Message (1) : 01
Version: 4 : 04
My AS: 15802 : 3dba
Hold time: 180 : 00b4
neighbor 10.254.3.2 remote-as zzzzz
neighbor 10.254.3.2 update-source Loopback0
neighbor 10.254.3.2 next-hop-self
neighbor x.x.x.x remote-as 15802 <-------
12-05-2022 12:13 AM - last edited on 12-09-2022 02:12 AM by Translator
can I see
show ip bgp nei
after upgrade ?
12-05-2022 03:38 AM - last edited on 12-09-2022 02:13 AM by Translator
#sh ip bgp neighbors x.x.x.x
BGP neighbor is x.x.x.x, remote AS 15802, external link
BGP version 4, remote router ID 10.44.17.15
BGP state = Established, up for 1d23h
Last read 00:00:07, last write 00:00:31, hold time is 180, keepalive interval is 60 seconds
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
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: 11 612342
Keepalives: 3133 2
Route Refresh: 0 0
Total: 3145 612345
Do log neighbor state changes (via global configuration)
Default minimum time between advertisement runs is 30 seconds
For address family: IPv4 Unicast
Session: x.x.x.x
BGP table version 753, neighbor version 753/0
Output queue size : 0
Index 2, Advertise bit 1
2 update-group member
Inbound soft reconfiguration allowed
Inbound path policy configured
Outbound path policy configured
Route map for incoming advertisements is LOCAL-PREF
Route map for outgoing advertisements is PREPEND
Slow-peer detection is disabled
Slow-peer split-update-group dynamic is disabled
Sent Rcvd
Prefix activity: ---- ----
Prefixes Current: 2 47 (Consumes 65111360 bytes)
Prefixes Total: 10 518
Implicit Withdraw: 8 227
Explicit Withdraw: 0 4
Used as bestpath: n/a 47
Used as multipath: n/a 0
Used as secondary: n/a 0
Saved (soft-reconfig): n/a 478713 (Consumes 65104968 bytes)
Outbound Inbound
Local Policy Denied Prefixes: -------- -------
route-map: 0 3322877
AS_PATH too long: 0 1143333
Other Policies: 1384 n/a
Total: 1384 4466210
Number of NLRIs in the update sent: max 1, min 0
Current session network count peaked at 280 entries at 11:26:23 Dec 3 2022 UTC (1d23h ago)
Highest network count observed at 280 entries at 11:26:23 Dec 3 2022 UTC (1d23h ago)
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 x.x.x.x
Route to peer address reachability Up: 1; Down: 0
Last notification 1d23h
Connections established 1; dropped 0
Last reset never
External BGP neighbor configured for connected checks (single-hop no-disable-connected-check)
Interface associated: GigabitEthernet0/0/0 (peering address in same link)
Transport(tcp) path-mtu-discovery is enabled
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 1
Local host: y.y.y.y, Local port: 42369
Foreign host: x.x.x.x, 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 0xA3492FA):
Timer Starts Wakeups Next
Retrans 3141 1 0x0
TimeWait 0 0 0x0
AckHold 41766 5660 0x0
SendWnd 0 0 0x0
KeepAlive 0 0 0x0
GiveUp 0 0 0x0
PmtuAger 169486 169485 0xA349378
DeadWait 0 0 0x0
Linger 0 0 0x0
ProcessQ 0 0 0x0
iss: 3311521962 snduna: 3311582118 sndnxt: 3311582118
irs: 2990284550 rcvnxt: 3069037409
sndwnd: 31723 scale: 0 maxrcvwnd: 16384
rcvwnd: 15342 scale: 0 delrcvwnd: 1042
SRTT: 1000 ms, RTTO: 1003 ms, RTV: 3 ms, KRTT: 0 ms
minRTT: 3 ms, maxRTT: 1000 ms, ACK hold: 200 ms
uptime: 170940435 ms, Sent idletime: 7971 ms, Receive idletime: 8171 ms
Status Flags: active open
Option Flags: nagle, path mtu capable
IP Precedence value : 6
Datagrams (max data segment is 1460 bytes):
Rcvd: 59892 (out of order: 0), with data: 56777, total data bytes: 78752858
Sent: 74915 (retransmit: 1, fastretransmit: 0, partialack: 0, Second Congestion: 0), with data: 3139, total data bytes: 60155
Packets received in fast path: 0, fast processed: 0, slow path: 0
fast lock acquisition failures: 0, slow path: 0
TCP Semaphore 0x7F9B65B454E8 FREE
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