I am load balancing traffic on dual, same size links aggregating to the same VRF on the PE router (Juniper MX5 JunOS 11.4). Traffic from the CE (Cisco) is balancing nicely but I need get the reverse right.
I am not NATing inside the multi-site network, the only NATing happens on the edge firewall to the Internet.
I have configured the VRF as follows on the Juniper PE router:
# show routing-instances {client}
instance-type vrf;
.
.
vrf-export {client}-load-balance;
.
.
routing-options {
static {
.
.
route 10.0.0.0/24 next-hop [ 196.33.144.11 196.33.144.3 ];
.
.
}
}
forwarding-options {
load-balance {
indexed-next-hop;
per-flow {
hash-seed;
}
}
}
and in the main configuration this:
# show policy-options policy-statement {client}-load-balance
then {
load-balance per-packet;
}
and
# show forwarding-options hash-key
family inet {
layer-3;
layer-4;
}
The router still chooses only the 196.33.144.3 hop to route the subnet's (10.0.0.0/24) traffic to and not balancing over both links.
Here are some checks:
# run show route forwarding-table table {client}
Routing table: {client}.inet
Internet:
Destination Type RtRef Next hop Type Index NhRef Netif
default user 0 8:5b:e:84:4c:b0 ucst 561 3 ge-1/1/2.3017
default perm 0 rjct 961 1
0.0.0.0/32 perm 0 dscd 959 1
10.0.0.0/24 user 0 196.33.144.3 ucst 589 5 ge-1/1/5.2100
10.0.0.55/32 user 0 ucst 645 6 gr-1/1/10.1
10.0.0.210/32 user 0 ucst 645 6 gr-1/1/10.1
10.0.6.0/24 user 0 ucst 921 3 gr-1/1/10.16
.
.
and
# run show route 10.0.0.0 table {client}.inet.0
{client}.inet.0: 19 destinations, 20 routes (19 active, 0 holddown, 0 hidden)
+ = Active Route, - = Last Active, * = Both
10.0.0.0/24 *[Static/5] 3d 07:43:36
> to 196.33.144.3 via ge-1/1/5.2100
to 196.33.144.11 via gr-1/1/10.1
and
# run show route table {client}.inet.0 detail
{client}.inet.0: 19 destinations, 20 routes (19 active, 0 holddown, 0 hidden)
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10.0.0.0/24 (1 entry, 1 announced)
*Static Preference: 5
Next hop type: Router, Next hop index: 1048574
Address: 0xb6b407c
Next-hop reference count: 3
Next hop: 196.33.144.3 via ge-1/1/5.2100, selected
Next hop: 196.33.144.11 via gr-1/1/10.1
State: <Active Int Ext>
Age: 3d 7:46:23
Task: RT
Announcement bits (2): 0-RT 2-KRT
AS path: I
AS path: Recorded
10.0.0.55/32 (1 entry, 1 announced)
*Static Preference: 5
.
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There are guides explaining this using the default inet.0 instance of the router but I can't find examples of this being done inside a VRF.
I am trying the vrf-export command as an alternative for "forwading-table export load-balance-policy-name" because the VRF does not have the forwarding-table option.
Any ideas what I can try?
forwading-table export load-balance-policy-name
" That's strange, without modifying your forwarding-table, ECMP isn't going to work. I don't mean to offend you, but are you positive you're trying to put it in under the correctedit
level? It should beset routing-options forwarding-table export {client}-load-balance
.