Hi,
Why would a router advertise the default RT on behalf of other router in
a full mesh IBGP? (The RR case is very clear)
Regards,
Mihai
On 06/06/2017 09:42 PM, Ivan Ivanov wrote:
Hi,
Check this link -
https://www.juniper.net/documentation/en_US/junos/topics/concept/vpn-proxy-bgp-route-target-filtering-understanding.html
If you configure the rest of the routers with family route-target r3 and
r4 will stop sending the proxy route you see. Or just use RR.
Ivan,
On Tue, Jun 6, 2017 at 9:01 PM, Mihai <[email protected]
<mailto:[email protected]>> wrote:
Update: using route policies with rtf-prefix-list works, but
rtf-prefix-lists are supported from Junos 12.2 and I have devices
with older software.
I am more interested if this is a 'normal' behavior.
Regards,
Mihai
On 06/06/2017 07:41 PM, Mihai wrote:
Hi,
I have three routers (r1,r3,r4) and a full mesh IBGP between them.
R1 is configured with inet-vpn , R3 and R4 with inet-vpn and
route-target.
r1# show protocols bgp
group IBGP {
type internal;
local-address 1.1.1.1;
family inet-vpn {
unicast;
}
neighbor 3.3.3.3;
neighbor 4.4.4.4;
}
r3# show protocols bgp
group IBGP {
type internal;
local-address 3.3.3.3;
family inet-vpn {
unicast;
}
family route-target;
neighbor 1.1.1.1;
neighbor 4.4.4.4;
}
r4# show protocols bgp
group IBGP {
type internal;
local-address 4.4.4.4;
family inet-vpn {
unicast;
}
family route-target;
neighbor 1.1.1.1;
neighbor 3.3.3.3;
}
I don't understand why R3 and R4 are advertising the default rt
route
(0:0:0/0) in this topology as I am not using route reflectors.
r3# run show table bgp.rt
Jun 06 18:10:05
bgp.rtarget.0: 1 destinations, 2 routes (1 active, 0 holddown, 0
hidden)
+ = Active Route, - = Last Active, * = Both
0:0:0/0
*[RTarget/5] 00:10:46
Type Default
Local
[BGP/170] 00:10:42, localpref 100, from 4.4.4.4
AS path: I, validation-state: unverified
> to 10.0.2.6 via ge-0/0/4.34
r4# run show table bgp.rt
bgp.rtarget.0: 1 destinations, 2 routes (1 active, 0 holddown, 0
hidden)
+ = Active Route, - = Last Active, * = Both
0:0:0/0
*[RTarget/5] 00:11:13
Type Default
Local
[BGP/170] 00:11:09, localpref 100, from 3.3.3.3
AS path: I, validation-state: unverified
> to 10.0.2.5 via ge-0/0/3.34
If I want to create a VRF/L2VPN/VPLS on R3 (first) and R4
(later) the
service will be down because R3 will not readvertise the
VRF/L2VPN/VPLS
when is receiving the VPN RT/ROUTE from R4.
The only solution to get the R3 VPN route on R4 is by requesting
it with
a ROUTE REFRESH (clear soft-inbound) from R4.
This has been tested on Junos 13.3 and 14.1.
PS: I don't want to configure R3/R4 with "keep all" and I can't
make any
configuration that will reset the BGP sessions.
Does this look like a BUG?
Regards,
Mihai
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Best Regards!
Ivan Ivanov
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