Hello,
Use a ttl on the bgp session with the customer -
Rgds,
C.
Le 26/04/2013 16:26, Alex Arseniev a écrit :
Works fine for me in the lab on MX80+JUNOS 12.3 ( I use BGP-LU though,
too busy to change to regular "inet unicast":-)
[edit logical-systems MX2-RR]
aarseniev@mx80# run show route logical-system MX2-RR protocol bgp
extensive
inet.0: 29 destinations, 30 routes (27 active, 0 holddown, 2 hidden)
198.18.0.6/32 (1 entry, 1 announced)
TSI:
KRT in-kernel 198.18.0.6/32 -> {indirect(1048668)}
*BGP Preference: 170/-101
Next hop type: Indirect
Address: 0x26e8010
Next-hop reference count: 6
Source: 198.18.0.11
Next hop type: Discard
Protocol next hop: 192.0.2.1
Push 299904
Indirect next hop: 29941d8 1048668 INH Session ID:
0x280008
State: <Active Int Ext>
Local AS: 50928 Peer AS: 50928
Age: 5:14 Metric2: 0
Validation State: unverified
Task: BGP_50928.198.18.0.11+179
Announcement bits (2): 3-KRT 5-Resolve tree 2
AS path: 31133 50928 I (Looped: 50928)
Communities: 56666:56666
Accepted
Route Label: 299904
Localpref: 100
Router ID: 198.18.0.11
Secondary Tables: inet.3
Indirect next hops: 1
Protocol next hop: 192.0.2.1 Metric: 0
Push 299904
Indirect next hop: 29941d8 1048668 INH Session
ID: 0x280008
[edit logical-systems MX2-RR]
aarseniev@mx80# show policy-options policy-statement set-nh
term 1 {
from {
protocol bgp;
community 56666:56666;
}
then {
next-hop 192.0.2.1;
accept;
}
}
[edit logical-systems MX2-RR]
aarseniev@sadok# show routing-options
static {
route 192.0.2.1/32 discard;
}
----- Original Message ----- From: "Eric Krichbaum" <e...@telic.us>
To: <juniper-nsp@puck.nether.net>
Sent: Friday, April 26, 2013 2:36 PM
Subject: [j-nsp] next-hop driving me crazy
This should be simple but I can't get the behavior I want.
Blackhole scenario. Customer set community, I want to see that
community
and set next-hop to an address I have with a discard. I've tried both a
discard interface and a basic static route. Those seem ok either way.
set routing-options static route 192.0.2.1/32 discard
Route comes in and is accepted by policy. With no next-hop 192.0.2.1
action, I see it as a valid route so I know the policy is happening.
When I
add the next-hop action, the route becomes "Next hop type: Unusable"
with
"Inactive reason: Unusable path". I don't see anything special about
this
and what I translated from my cisco versions doesn't look all that
different
from various black hole presentations I find.
Anyone have a magic answer?
Thanks,
Eric
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