07-29-2018 07:35 AM
Routes in route table not sent to bgp peer at 10.0.79.70 but only two subnets sent. Need to send them all including default route.
<hostname removed>#sh ip bgp nei 10.0.79.70 adv
BGP table version is 1840, local router ID is 172.16.159.17
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
r RIB-failure, S Stale, m multipath, b backup-path, f RT-Filter,
x best-external, a additional-path, c RIB-compressed,
Origin codes: i - IGP, e - EGP, ? - incomplete
RPKI validation codes: V valid, I invalid, N Not found
Network Next Hop Metric LocPrf Weight Path
*> 10.0.79.64/28 0.0.0.0 0 32768 i
*> 172.16.159.17/32 0.0.0.0 0 32768 i
router bgp 64600
bgp router-id 172.16.159.17
bgp log-neighbor-changes
network 10.0.17.0 mask 255.255.255.0
network 10.0.79.64 mask 255.255.255.240
network 172.16.159.17 mask 255.255.255.255
network 172.16.159.20 mask 255.255.255.254
neighbor 10.0.79.70 remote-as 65310
neighbor 10.0.79.70 description <removed>
neighbor 10.0.79.70 timers 10 30
neighbor 10.0.79.70 soft-reconfiguration inbound
neighbor 152.176.112.225 remote-as 65000
neighbor 152.176.112.225 description CE to PE RVDL9E01
neighbor 152.176.112.225 timers 30 90
neighbor 152.176.112.225 fall-over bfd
neighbor 152.176.112.225 send-community
neighbor 152.176.112.225 soft-reconfiguration inbound
neighbor 152.176.112.225 route-map PIP-IN-PRIMARY in
neighbor 152.176.112.225 route-map PIP-OUT-PRIMARY out
sh ip bgp nei
BGP neighbor is 10.0.79.70, remote AS 65310, external link
Description: <removed>
BGP version 4, remote router ID 10.0.79.70
BGP state = Established, up for 00:00:42
Last read 00:00:02, last write 00:00:04, hold time is 30, keepalive interval is 10 seconds
Configured hold time is 30, keepalive interval is 10 seconds
Minimum holdtime from neighbor is 0 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
Enhanced Refresh Capability: advertised and 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: 2 2
Keepalives: 6 6
Route Refresh: 0 0
Total: 9 9
Default minimum time between advertisement runs is 30 seconds
For address family: IPv4 Unicast
Session: 10.0.79.70
BGP table version 1854, neighbor version 1854/0
Output queue size : 0
Index 18, Advertise bit 0
18 update-group member
Inbound soft reconfiguration allowed
Outbound path policy configured
Route map for outgoing advertisements is LOCAL-OUT-PRIMARY
Slow-peer detection is disabled
Slow-peer split-update-group dynamic is disabled
Sent Rcvd
Prefix activity: ---- ----
Prefixes Current: 2 3 (Consumes 240 bytes)
Prefixes Total: 2 3
Implicit Withdraw: 0 0
Explicit Withdraw: 0 0
Used as bestpath: n/a 2
Used as multipath: n/a 0
Outbound Inbound
Local Policy Denied Prefixes: -------- -------
Other Policies: 1790 n/a
Total: 1790 0
Number of NLRIs in the update sent: max 286, 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 10.0.79.70
Connections established 3; dropped 2
Last reset 00:05:24, due to Active open failed
Transport(tcp) path-mtu-discovery is enabled
Graceful-Restart is disabled
ROUTING TABLE:
Gateway of last resort is 152.176.112.225 to network 0.0.0.0
B* 0.0.0.0/0 [20/0] via 152.176.112.225, 01:02:56
10.0.0.0/8 is variably subnetted, 1456 subnets, 17 masks
B 10.0.0.0/24 [20/0] via 152.176.112.225, 01:02:56
B 10.0.10.0/24 [20/0] via 152.176.112.225, 01:02:56
B 10.0.11.0/24 [20/0] via 152.176.112.225, 01:02:56
B 10.0.14.0/23 [20/0] via 152.176.112.225, 01:02:56
B 10.0.17.0/24 [20/0] via 10.0.79.70, 00:01:30
B 10.0.19.0/24 [20/0] via 152.176.112.225, 01:02:56
IP routing table name is default (0x0)
IP routing table maximum-paths is 32
Route Source Networks Subnets Replicates Overhead Memory (bytes)
connected 0 5 0 300 900
static 0 0 0 0 0
application 0 0 0 0 0
bgp 64600 1 1787 0 107280 321840
External: 1788 Internal: 0 Local: 0
internal 19 73720
Total 20 1792 0 107580 396460
Solved! Go to Solution.
08-01-2018 06:38 AM - edited 08-01-2018 06:39 AM
Hi
" route-map PIP-IN-PRIMARY in" Check this inbound route-map whether the "no-export " community command executed or not against the inbound traffic , may be that could be a reason .
07-29-2018 07:47 AM
Someon mentioned to me syncronization but this is disabled.
sh ip protocol
*** IP Routing is NSF aware ***
Routing Protocol is "application"
Sending updates every 0 seconds
Invalid after 0 seconds, hold down 0, flushed after 0
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
Maximum path: 32
Routing for Networks:
Routing Information Sources:
Gateway Distance Last Update
Distance: (default is 4)
Routing Protocol is "bgp 64600"
Outgoing update filter list for all interfaces is not set
Incoming update filter list for all interfaces is not set
IGP synchronization is disabled
Automatic route summarization is disabled
Neighbor(s):
Address FiltIn FiltOut DistIn DistOut Weight RouteMap
10.0.79.70
152.176.112.225 PIP-IN-PRIMARY
Maximum path: 1
Routing Information Sources:
Gateway Distance Last Update
10.0.79.70 20 00:17:30
152.176.112.225 20 00:02:54
Distance: external 20 internal 200 local 200
07-29-2018 07:48 AM
Hello,
the only networks you are sending are:
network 10.0.17.0 mask 255.255.255.0
network 10.0.79.64 mask 255.255.255.240
network 172.16.159.17 mask 255.255.255.255
Are these networks in your routing table ? Post the full configs of both neighbors including the output of 'show ip route'.
07-29-2018 07:57 AM
The two advertised subnets are the Loopback and Gigabit0/1 interface. Nothing from the routing table is injected into the bgp peer 10.0.79.70.
#sh ip bgp nei 10.0.79.70 adv
BGP table version is 1868, local router ID is 172.16.159.17
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
r RIB-failure, S Stale, m multipath, b backup-path, f RT-Filter,
x best-external, a additional-path, c RIB-compressed,
Origin codes: i - IGP, e - EGP, ? - incomplete
RPKI validation codes: V valid, I invalid, N Not found
Network Next Hop Metric LocPrf Weight Path
*> 10.0.79.64/28 0.0.0.0 0 32768 i
*> 172.16.159.17/32 0.0.0.0 0 32768 i
Total number of prefixes 2
#sh ip int brief
Interface IP-Address OK? Method Status Protocol
Embedded-Service-Engine0/0 unassigned YES NVRAM administratively down down
GigabitEthernet0/0 10.0.17.1 YES manual administratively down down
GigabitEthernet0/1 10.0.79.65 YES manual up up
GigabitEthernet0/2 152.176.112.226 YES NVRAM up up
Loopback0 172.16.159.17 YES NVRAM up up
Routing table has 1700 subnets.
Original post has bgp config. Routing in/out with peer 152.176.112.225 works fine. Only with peer 10.0.79.70 is not sending. However recieving subnets work fine. Its only outbound the route injection not working. I dont have access to remote peer but it is confirmed no subnets recieved from my router.
pbserv-uschi300-re01#sh ip bgp | i 10.0.79.70
*> 10.0.17.0/24 10.0.79.70 0 0 65310 ?
*> 10.0.76.144/29 10.0.79.70 0 0 65310 ?
* 10.0.79.64/28 10.0.79.70 0 0 65310 ?
07-29-2018 08:00 AM
Interface configuration of peer.
interface GigabitEthernet0/1
ip address 10.0.79.65 255.255.255.240
no ip redirects
no ip unreachables
no ip proxy-arp
ip accounting output-packets
ip flow ingress
duplex auto
speed auto
no mop enabled
service-policy input ingress-mark
07-29-2018 08:05 AM
Hello,
how is this interface involved in BGP ?
Interface configuration of peer.
interface GigabitEthernet0/1
ip address 10.0.79.65 255.255.255.240
The only peer you have configured is:
10.0.79.70
07-29-2018 08:17 AM
Thx for the replies.
Peers are:
10.0.79.70 Gi0/1 Working only inbound updates only.
152.176.112.225 Gi0/2 Working both in and outbound
router bgp 64600
bgp router-id 172.16.159.17
bgp log-neighbor-changes
network 10.0.17.0 mask 255.255.255.0
network 10.0.79.64 mask 255.255.255.240
network 172.16.159.17 mask 255.255.255.255
network 172.16.159.20 mask 255.255.255.254
neighbor 10.0.79.70 remote-as 65310
neighbor 10.0.79.70 description CE to <removed>
neighbor 10.0.79.70 update-source Loopback0
neighbor 10.0.79.70 timers 10 30
neighbor 10.0.79.70 next-hop-self
neighbor 10.0.79.70 soft-reconfiguration inbound
neighbor 152.176.112.225 remote-as 65000
neighbor 152.176.112.225 description CE to PE <removed>
neighbor 152.176.112.225 password <removed>
neighbor 152.176.112.225 timers 30 90
neighbor 152.176.112.225 fall-over bfd
neighbor 152.176.112.225 send-community
neighbor 152.176.112.225 soft-reconfiguration inbound
neighbor 152.176.112.225 route-map PIP-IN-PRIMARY in
neighbor 152.176.112.225 route-map PIP-OUT-PRIMARY out
07-29-2018 08:26 AM
Hello,
in your previous post you wrote:
--> Interface configuration of peer.
interface GigabitEthernet0/1
ip address 10.0.79.65 255.255.255.240
What is the purpose of this interface ? Where is this configured ? Either way, your routes are advertised but not received. We need to see the config of the peer router, as that is where the problem is likely located...
07-29-2018 08:32 AM
My router is receiving updates from layer 3 switch but only sending connected subnets and not any subnets from routing table.
Gig0/1 is the port connected to layer 3 3850 switch
G0/2 is coneected to a MPLS PE router.
pbserv-uschi300-re01#sh ip bgp nei 10.0.79.70 adv
BGP table version is 1898, local router ID is 172.16.159.17
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
r RIB-failure, S Stale, m multipath, b backup-path, f RT-Filter,
x best-external, a additional-path, c RIB-compressed,
Origin codes: i - IGP, e - EGP, ? - incomplete
RPKI validation codes: V valid, I invalid, N Not found
Network Next Hop Metric LocPrf Weight Path
*> 10.0.79.64/28 0.0.0.0 0 32768 i
*> 172.16.159.17/32 0.0.0.0 0 32768 i
For example the update comes from the PE router but not readvertised to the connected layer 3 switch.
pbserv-uschi300-re01#sh ip route 10.0.24.0
Routing entry for 10.0.24.0/24
Known via "bgp 64600", distance 20, metric 0
Tag 65000, type external
Last update from 152.176.112.225 02:04:58 ago
Routing Descriptor Blocks:
* 152.176.112.225, from 152.176.112.225, 02:04:58 ago
Route metric is 0, traffic share count is 1
AS Hops 2
Route tag 65000
MPLS label: none
07-29-2018 08:41 AM
Hello,
post the full configs of both peers and your PE router.
07-29-2018 12:08 PM
Hello,
--> Route map for outgoing advertisements is LOCAL-OUT-PRIMARY
Where is this route map applied, and what does it specify ?
07-30-2018 04:26 PM
Can you do a "sh ip bgp 10.0.10.0/24" and paste the results? I wonder if the routes being received from 152.176.112.225 has the "no-export" community tagged.
07-31-2018 01:17 AM - edited 07-31-2018 01:18 AM
Hello
Can you post the following:
sh ip bgp neighbors 10.0.79.70 advertised-routes | b N
Also request your bgp peer to post the output of
sh ip bgp neighbors 10.0.79.x received-routes | b N
This wll confirm if the prefixes are being sent from your router and if they are being received but filtered or not.
08-02-2018 02:31 PM
Found the problem. Route map inbound from PE had this:
set community no-export additive
This command was telling BGP not to forward these subnets out another EBG process.
Removed no-export additive and works find.
Thanks all.
08-01-2018 06:38 AM - edited 08-01-2018 06:39 AM
Hi
" route-map PIP-IN-PRIMARY in" Check this inbound route-map whether the "no-export " community command executed or not against the inbound traffic , may be that could be a reason .
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