Hi Deniz,
Sorry for the delay.
You mean GoBGP packs multiple NLRIs in to a single UPDATE message when
ipv4-unicast, but does not pack NLRIs when l3vpn-ipv4-unicast and separates them
for each UPDATE messages, right?
I've tested on my local with the following codes, as you said,
l3vpn-ipv4-unicast routes are not packed as a single UPDATE message.
// add ipv4 routes
attrs := []bgp.PathAttributeInterface{
bgp.NewPathAttributeOrigin(0),
bgp.NewPathAttributeNextHop("10.0.0.1"),
bgp.NewPathAttributeAsPath(nil),
}
ipv4Path1 := table.NewPath(nil, bgp.NewIPAddrPrefix(24, "172.16.1.0"), false,
attrs, time.Now(), false)
ipv4Path2 := table.NewPath(nil, bgp.NewIPAddrPrefix(24, "172.16.2.0"), false,
attrs, time.Now(), false)
if _, err := s.AddPath("", []*table.Path{ipv4Path1, ipv4Path2}); err !=
nil {
log.Fatal(err)
}
// add vpnv4 routes
labels := bgp.NewMPLSLabelStack(100)
rd, err := bgp.ParseRouteDistinguisher("65000:100")
if err != nil {
log.Fatal(err)
}
nlri1 := bgp.NewLabeledVPNIPAddrPrefix(24, "172.17.1.0", *labels, rd)
attrs1 := []bgp.PathAttributeInterface{
bgp.NewPathAttributeOrigin(0),
bgp.NewPathAttributeAsPath(nil),
bgp.NewPathAttributeMpReachNLRI("10.0.0.1",
[]bgp.AddrPrefixInterface{nlri1}),
}
vpnv4Path1 := table.NewPath(nil, nlri1, false, attrs1, time.Now(),
false)
nlri2 := bgp.NewLabeledVPNIPAddrPrefix(24, "172.17.2.0", *labels, rd)
attrs2 := []bgp.PathAttributeInterface{
bgp.NewPathAttributeOrigin(0),
bgp.NewPathAttributeAsPath(nil),
bgp.NewPathAttributeMpReachNLRI("10.0.0.1",
[]bgp.AddrPrefixInterface{nlri2}),
}
vpnv4Path2 := table.NewPath(nil, nlri2, false, attrs2, time.Now(),
false)
if _, err := s.AddPath("", []*table.Path{vpnv4Path1, vpnv4Path2}); err
!= nil {
log.Fatal(err)
}
And also I found that the packaging mechanism for ipv4-unicast are does not
implemented to other address families.
https://github.com/osrg/gobgp/blob/master/table/message.go
"packerMP" and "packerV4" packs paths to be sent into UPDATE messages, only
"packerV4" compares hash of path attributes and compress paths into a single
UPDATE message.
https://github.com/osrg/gobgp/blob/756cc9162afb675dd7ca159b6f07a6d5b927bcc1/table/message.go#L377-L398
Thanks,
Iwase
On 2018年05月04日 21:25, Deniz Aydın wrote:
Hi,
I have tried the same scenario with gobgpd and gobgp and the result is same. I
guess sending each of the l3vpn-ipv4-unicast route in a separate update is the
default method although sending the ipv4-unicast routes is not same. Its packs
routes in a single updates.
On 25 Apr 2018, at 15:02, Deniz Aydın <deniz.ay...@turknet.net.tr
<mailto:deniz.ay...@turknet.net.tr>> wrote:
Hi Iwase,
I have tried to send multiple routes for with the same rd and same attributes.
But its sends the update in multiple bgp updates. I expect to group prefixes
with the same RD and attributes (RT, local pref etc) in a single bgp updates.
Is this the supposed behaviour?
mpls := bgp.NewMPLSLabelStack(100)
rd := bgp.NewRouteDistinguisherTwoOctetAS(1,1)
ecommunities := []bgp.ExtendedCommunityInterface{
bgp.NewTwoOctetAsSpecificExtended(bgp.EC_SUBTYPE_ROUTE_TARGET, 1, 1, true),
}
nlri1 := bgp.NewLabeledVPNIPAddrPrefix(32, "11.0.0.1", *mpls, rd)
mplsattrs1 := []bgp.PathAttributeInterface{
bgp.NewPathAttributeOrigin(0),
bgp.NewPathAttributeExtendedCommunities(ecommunities),
bgp.NewPathAttributeMpReachNLRI("192.168.1.1",
[]bgp.AddrPrefixInterface{nlri1}),
}
nlri2 := bgp.NewLabeledVPNIPAddrPrefix(32, "11.0.0.2", *mpls, rd)
mplsattrs2 := []bgp.PathAttributeInterface{
bgp.NewPathAttributeOrigin(0),
bgp.NewPathAttributeExtendedCommunities(ecommunities),
bgp.NewPathAttributeMpReachNLRI("192.168.1.1",
[]bgp.AddrPrefixInterface{nlri2}),
}
//send the update
if _, err := s.AddPath("", []*table.Path{table.NewPath(nil, nlri1, false,
mplsattrs1, time.Now(), false),table.NewPath(nil, nlri2, false, mplsattrs2,
time.Now(), false)}); err != nil {
log.Fatal(err)
}
DEBU[0025] sent update Key=10.2.51.7
State=BGP_FSM_ESTABLISHED Topic=Peer attributes="[{Origin: i} {LocalPref:
100} {MpReach(l3vpn-ipv4-unicast): {Nexthop: 192.168.1.1, NLRIs:
[1:1:11.0.0.1/32]}} {Extcomms: [1:1]}]" nlri="[]" withdrawals="[]"
DEBU[0025] sent update Key=10.2.51.7
State=BGP_FSM_ESTABLISHED Topic=Peer attributes="[{Origin: i} {LocalPref:
100} {MpReach(l3vpn-ipv4-unicast): {Nexthop: 192.168.1.1, NLRIs:
[1:1:11.0.0.2/32]}} {Extcomms: [1:1]}]" nlri="[]" withdrawals="[]”
This the update from the router, multiple prefixes in a single update.
DEBU[0030] received update Key=10.2.51.7
Topic=Peer attributes="[{MpReach(l3vpn-ipv4-unicast): {Nexthop: 10.2.51.7,
NLRIs: [1:1:1.1.1.3/32 1:1:1.1.1.2/32 1:1:1.1.1.1/32]}} {Origin: ?} {Med: 0}
{LocalPref: 100} {Extcomms: [1:1]}]" nlri="[]" withdrawals="[]"
On 25 Apr 2018, at 11:09, Deniz Aydin <deniz.ay...@turknet.net.tr
<mailto:deniz.ay...@turknet.net.tr>> wrote:
Hi Iwase,
Sorry for late update. It was holiday in here :). And also thanks for the
sample code. I was lost in AddPath function in the server.go. Tried to use in
the native way but it seems it only has subfunction for EVPNNLRI’es. And then
no time dig more. Again great thanks for help. It save me lots of time. Also
Thanks Dale for the reply.
I have added router-target extended community to the code you have send.
gobgp
<https://github.com/osrg/gobgp/tree/3645e7dee68faff9bd4fbadbb47dc89ecd06058a>/packet
<https://github.com/osrg/gobgp/tree/3645e7dee68faff9bd4fbadbb47dc89ecd06058a/packet>/bgp
<https://github.com/osrg/gobgp/tree/3645e7dee68faff9bd4fbadbb47dc89ecd06058a/packet/bgp>/helper.go
helped me lot.
ecommunities := []bgp.ExtendedCommunityInterface{
bgp.NewTwoOctetAsSpecificExtended(bgp.EC_SUBTYPE_ROUTE_TARGET, 1, 1, true),
}
nlri := bgp.NewLabeledVPNIPAddrPrefix(32, "10.0.0.1", *mpls, rd)
attrs := []bgp.PathAttributeInterface{
bgp.NewPathAttributeOrigin(0),
bgp.NewPathAttributeExtendedCommunities(ecommunities),
bgp.NewPathAttributeMpReachNLRI("192.168.1.1", []bgp.AddrPrefixInterface{nlri}),
}
if _, err := s.AddPath("", []*table.Path{table.NewPath(nil, nlri, false,
mplsattrs, time.Now(), false)}); err != nil {
log.Fatal(err)
}
Thanks,
Deniz
On 23 Apr 2018, at 04:41, Iwase Yusuke <iwase.yusu...@gmail.com
<mailto:iwase.yusu...@gmail.com>> wrote:
Hi Deniz and Thanks Dale!
"gobgp/cmd/global.go" does similar, but it might be too complex.
https://github.com/osrg/gobgp/blob/master/gobgp/cmd/global.go#L1147-L1177
The following snippet helps for you?
mpls := bgp.NewMPLSLabelStack(100)
rd := bgp.NewRouteDistinguisherTwoOctetAS(65000, 100)
// Or, if you prefer to get RD from string;
// rd, err := bgp.ParseRouteDistinguisher("65000:100")
// if err != nil {
// return nil, err
// }
nlri := bgp.NewLabeledVPNIPAddrPrefix(24, "10.0.0.0", *mpls, rd)
attrs := []bgp.PathAttributeInterface{
bgp.NewPathAttributeOrigin(0),
bgp.NewPathAttributeAsPath([]bgp.AsPathParamInterface{
bgp.NewAs4PathParam(bgp.BGP_ASPATH_ATTR_TYPE_SEQ, []uint32{65002, 65001}),
}),
bgp.NewPathAttributeMpReachNLRI("192.168.1.1", []bgp.AddrPrefixInterface{nlri}),
}
path := table.NewPath(nil, nlri, false, attrs, time.Now(), false)
Thanks,
Iwase
On 2018年04月21日 05:49, Dale Worley wrote:
On 4/20/18 9:05 AM, Deniz Aydın wrote:
I am tring to use gobgp for just announcing l3vpn-ipv4-unicast routes
stored in database, some blackhole routes for different user profiles.
Can you give me an example how can I add some l3mpls vpn path like the
one in the /GoBGP as a Go Native BGP library./
I can give you some pointers: It looks like the GoBGP constructors for
route objects closely parallel the structure of routes inside BGP. So look
at https://tools.ietf.org/html/rfc3107#page-3 for how MPLS labels are
attached to prefixes, and https://tools.ietf.org/html/rfc4364#section-4.2
for how route distinguishers are used.
I see in github.com/osrg/gobgp/packet/bgp/bgp.go
<http://github.com/osrg/gobgp/packet/bgp/bgp.go> constructors like func
NewLabeledVPNIPAddrPrefix and a lot of lines containing "MPLS".
Dale
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