[j-nsp] VRF load balancing between pair of j-MX480 PEs and pair of c-7609 PEs
Sorilla, Edmar (NSN - AE/Dubai)
edmar.sorilla at nsn.com
Tue Feb 16 05:26:47 EST 2010
Hi Sergio,
We already found the issue. The problem lies on the Layer 3 link between MX routers.
Because it is a 10G gig link and the link to P is only 1G. The PE routers prefer this link
to forward the traffic instead of the link to P router.
We modified the OSPF cost of this 10G link to 25 so the MX routers will forward the traffic to P immediately
and everything worked fine with BGP multipath enable.
Thanks for your help. I really appreciated it.
Br,
Edmar
-----Original Message-----
From: ext Sergio D. [mailto:sdanelli at gmail.com]
Sent: Tue 2/16/2010 9:46 AM
To: Sorilla, Edmar (NSN - AE/Dubai)
Subject: Re: VRF load balancing between pair of j-MX480 PEs and pair of c-7609 PEs
Hmm I don't see an issue here.
You don't have "mpls label mode all-vrfs protocol bgp-vpnv4 per-vrf"
configured on the 7600, do you?
And what labels do you have allocated for the connected routes, are they
aggregate labels?
"sh mpls forwarding-table | in Huawei_Iu-U"
And do both Ciscos share the connected network that you have problems with
in that vrf between them?
On Mon, Feb 15, 2010 at 11:22 PM, Sorilla, Edmar (NSN - AE/Dubai) <
edmar.sorilla at nsn.com> wrote:
> Hi Sergio,
>
> Here are the configurations and outputs:
>
> Br,
> Edmar
>
>
> ----------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
> MX480-1
>
> admin at AUH-INJ-OR-MOBMX480-01> ...atement Huawei_Iu_U_import
> term 1 {
> from {
> protocol bgp;
> community [ Iu_C_3220 Iu_U_3210 ];
> }
> then accept;
> }
> term 2 {
> then reject;
> }
> admin at AUH-INJ-OR-MOBMX480-01> ...ons policy-statement Huawei_Iu_U_export
> term 1 {
> from protocol [ static direct ];
> then {
> metric 0;
> community add Iu_U_3210;
> accept;
> }
> }
> term 2 {
> then reject;
> }
>
> ------------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
> MX480-2
>
> admin at AUH-INJ-OR-MOBMX480-02> ...atement Huawei_Iu_U_import
> term 1 {
> from {
> protocol bgp;
> community [ Iu_C_3220 Iu_U_3210 ];
> }
> then accept;
> }
> term 2 {
> then reject;
> }
> admin at AUH-INJ-OR-MOBMX480-02> ...ons policy-statement Huawei_Iu_U_export
> term 1 {
> from protocol [ static direct ];
> then {
> metric 0;
> community add Iu_U_3210;
> accept;
> }
> }
> term 2 {
> then reject;
> }
>
> ------------------------------------------------------------------------------------------------------------------------------------
>
> impor01>show ip bgp vpnv4 vrf Huawei_Iu-U 10.164.128.33
> BGP routing table entry for 15802:3220:10.164.128.32/28, version 6182903
> Paths: (2 available, best #1, table Huawei_Iu-U)
> Multipath: eiBGP
> Not advertised to any peer
> Local, imported path from 15802:3201:10.164.128.32/28
> 10.44.105.3 (metric 30) from 10.19.56.141 (10.19.56.141)
> Origin IGP, metric 0, localpref 100, valid, internal, multipath, best
> Extended Community: RT:15802:3210
> Originator: 10.44.105.3, Cluster list: 10.19.56.141
> mpls labels in/out nolabel/20
> Local, imported path from 15802:13201:10.164.128.32/28
> 10.44.105.4 (metric 31) from 10.19.56.141 (10.19.56.141)
> Origin IGP, metric 0, localpref 100, valid, internal, multipath
> Extended Community: RT:15802:3210
> Originator: 10.44.105.4, Cluster list: 10.19.56.141
> mpls labels in/out nolabel/43
>
> --------------------------------------------------------------------------------------------------------------------------------
> impor01>show mpls forwarding-table 10.44.105.3
> Local Outgoing Prefix Bytes Label Outgoing Next Hop
> Label Label or VC or Tunnel Id Switched interface
> 50 298 10.44.105.3/32 300 Gi5/2
> 10.19.120.109
> impor01>show mpls forwarding-table 10.44.105.4
> Local Outgoing Prefix Bytes Label Outgoing Next Hop
> Label Label or VC or Tunnel Id Switched interface
> 87 302 10.44.105.4/32 915848 Gi5/2
> 10.19.120.109
>
> --------------------------------------------------------------------------------------------------------------------------------
>
> impor02>show ip bgp vpnv4 vrf Huawei_Iu-U 10.164.128.33
> BGP routing table entry for 15802:13220:10.164.128.32/28, version 3390318
> Paths: (2 available, best #2, table Huawei_Iu-U)
> Multipath: eiBGP
> Not advertised to any peer
> Local, imported path from 15802:3201:10.164.128.32/28
> 10.44.105.3 (metric 31) from 10.19.56.141 (10.19.56.141)
> Origin IGP, metric 0, localpref 100, valid, internal, multipath
> Extended Community: RT:15802:3210
> Originator: 10.44.105.3, Cluster list: 10.19.56.141
> mpls labels in/out nolabel/20
> Local, imported path from 15802:13201:10.164.128.32/28
> 10.44.105.4 (metric 30) from 10.19.56.141 (10.19.56.141)
> Origin IGP, metric 0, localpref 100, valid, internal, multipath, best
> Extended Community: RT:15802:3210
> Originator: 10.44.105.4, Cluster list: 10.19.56.141
> mpls labels in/out nolabel/43
>
>
> --------------------------------------------------------------------------------------------------------------------------------
>
> impor02>show mpls forwarding-table 10.44.105.3
> Local Outgoing Prefix Bytes Label Outgoing Next Hop
> Label Label or VC or Tunnel Id Switched interface
> 141 160 10.44.105.3/32 0 Gi5/2
> 10.19.121.9
>
> impor02>show mpls forwarding-table 10.44.105.4
> Local Outgoing Prefix Bytes Label Outgoing Next Hop
> Label Label or VC or Tunnel Id Switched interface
> 93 292 10.44.105.4/32 370 Gi5/2
> 10.19.121.9
>
> ------------------------------------------------------------------------------------------------------------------------------------------------
>
>
> ------------------------------
> *From:* ext Sergio D. [mailto:sdanelli at gmail.com]
> *Sent:* Tuesday, February 16, 2010 7:45 AM
> *To:* Sorilla, Edmar (NSN - AE/Dubai)
> *Cc:* juniper-nsp at puck.nether.net
> *Subject:* RE:VRF load balancing between pair of j-MX480 PEs and pair of
> c-7609 PEs
>
> Edmar,
> Can you provide us with the policy configuration from the Junipers?
>
> vrf-import Huawei_Iu_U_import;
> vrf-export Huawei_Iu_U_export;
>
> Those two specifically.
>
> a "show ip bgp v v Huawei_Iu-U x.x.x.x" From the Cisco routers where
> x.x.x.x is the source IP of where the traffic is coming from to the Cisco
> destinations? , a "sh mpls forwarding-table 10.44.105.3" and ""sh mpls
> forwarding-table 10.44.105.4" When the problem is happening of course.
>
> --
> Sergio
>
--
Sergio Danelli
JNCIE #170
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