Routing

Hello! 

I'm trying to configure NAT on MS-MPC (MX480) . but the configuration is not applied.

I want NAPT on one special destination-IP ( 8.8.8.8 example) to special pool consisting one IP.

example:

term DELTA_REAL_IP {
    from {
        destination-address {
            8.8.8.8/32;
        }
        source-prefix-list {
            BRAS_NETWORK_NAT;
        }
    }
    then {                              
        translated {
            destination-prefix 185.13.112.250/32;
            translation-type {
                dnat-44;
            }
        }
    }
}

{master}[edit services nat rule AMS]
admin@M# commit check 
re0: 
[edit services]
  'nat'
    Rule AMS has terms of different kind
error: configuration check-out failed

{master}[edit services nat rule AMS]
admin@M# 

I tryed this

pool DELTA_REAL_IP {
 address 185.13.112.250/32;
 port {
 automatic {
 random-allocation;
 }
 }
 address-allocation round-robin;
}

    term DELTA_REAL_IP {
        from {
            destination-address {
                8.8.8.8/32;
            }
            source-prefix-list {
                BRAS_NETWORK_NAT;
            }
        }
        then {
            translated {
                source-pool DELTA_REAL_IP;
                translation-type {
                    napt-44;
                }
                address-pooling paired;
            }
        }
    }
}

{master}[edit services nat]
admin@M# commit check 
re0: 
error: AMS-NAT contraint check failed for pool DELTA_REAL_IP service-set AMS interface ams0
size of the pool should be >=  AMS configured active member count
[edit services]
  'service-set AMS'
    service-set policies inconsistent for ams-interface
configuration check succeeds
re1: 
configuration check succeeds

{master}[edit services nat]
admin@M10_MX480# 

If you're trying to do a dest-nat (make traffic to 8.8.8.8 go to 185.13.112.250 instead), the first one looks good.  The second one is set for a source-nat instead of dest-nat, that's why the error returned is different.

You didn't provide the service-set config that contains the rule, but it is probably related.  Take a look at the Understanding Aggregated Multiservices Interfaces page.  There is a really large block on the second page that has a note about NAT44 and load balancing with AMS.  The validation may be failing if the load balancing configured in the service set isn't symmetric. That would sort of fit with the error message it returned in the first example.

Oh, and there is this page too with a full example, although it is source rather than dest nat:

http://www.juniper.net/techpubs/en_US/junos14.2/topics/example/nat-static-source-translation-ams.html

-Chad

Hello! Thx for your answer.
I read your example, but this does not apply to my situation

I upload scheme for a better understanding of the problem.

Hello,

---

@radeon-1 wrote:

Hello! 

I'm trying to configure NAT on MS-MPC (MX480) . but the configuration is not applied.

I want NAPT on one special destination-IP ( 8.8.8.8 example) to special pool consisting one IP.

 

---

This is supported, but not with AMS with >1 active member.

Use a special AMS with 1 active MAMS member or use plain MS interfaces.

---

@radeon-1 wrote:

{master}[edit services nat]
admin@M# commit check 
re0: 
error: AMS-NAT contraint check failed for pool DELTA_REAL_IP service-set AMS interface ams0
size of the pool should be >=  AMS configured active member count
[edit services]
  'service-set AMS'
    service-set policies inconsistent for ams-interface
configuration check succeeds
re1: 
configuration check succeeds

{master}[edit services nat]
admin@M10_MX480# 

 

---

JUNOS is trying to tell You that a NAPT pool with 1 public IP is not supported with AMS with >1 active member since there is no way to split /32 between 2 or more MAMS members.

HTH

Thanks

Alex

Hello, Alex!

I tried / 29, but it seems to me now the problem in return traffic

Rule/ Trasnlation is works.

but  

{master}
admin@M10_MX480> show services stateful-firewall flows extensive | match 8.8.8.8 
ICMP 192.168.72.145 -> 8.8.8.8 Forward I 179
ICMP 8.8.8.8 -> 185.13.112.252 Forward O 0

{master}
admin@M10_MX480>
{master}
admin@M10_MX480> show services stateful-firewall flows | match 8.8.8.8    
UDP     192.168.72.144:61984 ->        8.8.8.8:53    Forward  I               5
UDP            8.8.8.8:53    -> 185.13.112.253:41663 Forward  O               0
UDP     192.168.72.144:64695 ->        8.8.8.8:53    Forward  I               5
UDP            8.8.8.8:53    -> 185.13.112.253:22013 Forward  O               0
ICMP    192.168.72.144       ->        8.8.8.8       Forward  I              87
ICMP           8.8.8.8       -> 185.13.112.253       Forward  O               0

{master}
admin@M10_MX480> 



{master}
admin@M10_MX480> show route table inet.0 185.13.112.253 extensive    

inet.0: 541141 destinations, 924298 routes (540938 active, 0 holddown, 620 hidden)
185.13.112.253/32 (1 entry, 1 announced)
TSI:
KRT in-kernel 185.13.112.253/32 -> {Service}
Aggregated into 185.13.112.0/22
        *Static Preference: 1
                Next hop type: Service
                Address: 0x16568224
                Next-hop reference count: 12
                Next hop: 
                Next-hop service: AMS
                Next-hop index: 620
                State: <Active Int ProxyArp>
                Age: 5:22 
                Validation State: unverified 
                Task: RPD Unix Domain Server./var/run/rpd_serv.local
                Announcement bits (3): 0-KRT 5-Resolve tree 2 7-Aggregate 
                AS path: I

{master}
admin@M10_MX480> show route table inet.0 185.13.112.162 extensive    

inet.0: 541141 destinations, 924298 routes (540938 active, 0 holddown, 620 hidden)
185.13.112.160/29 (1 entry, 1 announced)
TSI:
KRT in-kernel 185.13.112.160/29 -> {Service}
Aggregated into 185.13.112.0/22
        *Static Preference: 1
                Next hop type: Service
                Address: 0x16568224
                Next-hop reference count: 12
                Next hop: 
                Next-hop service: AMS
                Next-hop index: 620
                State: <Active Int ProxyArp>
                Age: 5:23 
                Validation State: unverified 
                Task: RPD Unix Domain Server./var/run/rpd_serv.local
                Announcement bits (3): 0-KRT 5-Resolve tree 2 7-Aggregate 
                AS path: I

{master}
admin@M10_MX480> 




{master}
admin@M10_MX480> show configuration services    
service-set AMS {
    nat-rules AMS;
    next-hop-service {
        inside-service-interface ams0.10;
        outside-service-interface ams0.20;
    }
}
nat {
    pool OFFICE {
        address-range low 185.13.112.160 high 185.13.112.191;
        port {
            automatic {
                random-allocation;
            }
        }
        address-allocation round-robin;
    }
    pool TEST_PBA {
        address-range low 185.13.112.192 high 185.13.112.200;
        port {
            automatic {
                random-allocation;
            }
            secured-port-block-allocation block-size 64 max-blocks-per-address 8;
        }
        address-allocation round-robin;
        mapping-timeout 120;
    }
    pool DELTA_REAL_IP {
        address 185.13.112.248/29;
        port {
            automatic {
                random-allocation;
            }
        }
        address-allocation round-robin;
    }
    rule AMS {
        match-direction input;
        term DELTA_REAL_IP {
            from {
                source-address {
                    192.168.72.0/24;
                }
                destination-address {
                    8.8.8.8/32;
                }
            }
            then {
                translated {
                    source-pool DELTA_REAL_IP;
                    translation-type {
                        napt-44;        
                    }
                    address-pooling paired;
                }
            }
        }
        term OFFICE {
            from {
                source-address {
                    192.168.72.0/24;
                }
                application-sets ALG_WITHOUT_EIM_EIF;
            }
            then {
                translated {
                    source-pool OFFICE;
                    translation-type {
                        napt-44;
                    }
                    address-pooling paired;
                }
            }
        }
        term OFFICE_IEM {
            from {
                source-address {
                    192.168.72.0/24;
                }
            }
            then {
                translated {
                    source-pool OFFICE;
                    translation-type {
                        napt-44;
                    }
                    mapping-type endpoint-independent;
                    filtering-type {
                        endpoint-independent;
                    }
                    address-pooling paired;
                }
            }
        }
        term BRAS {
            from {
                source-address {
                    10.141.0.0/16;
                    10.144.0.0/16;
                    10.145.0.0/16;
                    10.146.0.0/16;
                    10.148.0.0/16;
                    10.149.0.0/16;
                    10.150.0.0/16;
                    10.152.0.0/16;      
                    10.153.0.0/16;
                    10.154.0.0/16;
                    10.155.0.0/16;
                    10.156.0.0/16;
                }
                application-sets ALG_WITHOUT_EIM_EIF;
            }
            then {
                translated {
                    source-pool OFFICE;
                    translation-type {
                        napt-44;
                    }
                    address-pooling paired;
                }
            }
        }
        term BRAS_IEM {
            from {
                source-address {
                    10.141.0.0/16;
                    10.144.0.0/16;
                    10.145.0.0/16;
                    10.146.0.0/16;
                    10.148.0.0/16;
                    10.149.0.0/16;
                    10.150.0.0/16;
                    10.152.0.0/16;
                    10.153.0.0/16;
                    10.154.0.0/16;
                    10.155.0.0/16;
                    10.156.0.0/16;
                }
            }
            then {
                translated {
                    source-pool OFFICE;
                    translation-type {
                        napt-44;
                    }
                    mapping-type endpoint-independent;
                    filtering-type {
                        endpoint-independent;
                    }
                    address-pooling paired;
                }
            }
        }
    }
}

{master}
admin@M10_MX480>

Hello,

Two points:

1/ You need to announce Your NAT pool to outside world, via BGP or else.

2/ PBA is supported on MS-MPC only from 14.2R2 onwards.

Also, all commands on MS-MPC start with "show services sessions...".

"show services stateful-firewall..."  commands are for MS-DPC.

HTH

Thanks

Alex

hello!

1) i already announce this all network ( /22 ) to EBGP peer.

all the resources available on the Internet, except for 8.8.8.8 ( term DELTA_REAL_IP) 

admin@M10_MX480> ...ertising-protocol bgp 87.245.253.189 | match 185.13.
* 185.13.112.0/22         Self                                    I

{master}
admin@M10_MX480>

 2) Ok, thx. 

Hello,

And what happens if Your subs try to access 8.8.4.4?

Thanks

Alex

everything is OK.

I can not now showcased the result. 

Hello!

The problem was back in traffic with another border. my trouble 😞

Now trying to do the translation in a pool consisting of a single address.

JTAC was trying to make with the help (SecureMeeting)  within 2 hours. But the workaround is not found.

Hi there,

Glad You found the problem.

---

@radeon-1 wrote:

 

 

Now trying to do the translation in a pool consisting of a single address.

 

JTAC was trying to make with the help (SecureMeeting)  within 2 hours. But the workaround is not found.

---

There is no workaround for AMS with 2+ active MAMS and single /32 pool, period.

You need to change the NAT HA design and use another AMS with 1 active MAMS, or use plain MS interfaces.

HTH

Thanks

Alex

Hello!

Where i can read about this case? book or example?

ps: Allocate a single address pool (/32) <> service interface "expensive"

Hello,

---

@radeon-1 wrote:

Hello!

Where i can read about this case? book or example?

 

 

---

Try this free book  https://www.juniper.net/uk/en/training/jnbooks/day-one/networking-technologies-series/deploying-cgnat/ 

---

@radeon-1 wrote:

 

 

 

ps: Allocate a single address pool (/32) <> service interface "expensive"

---

You don't have to dedicate 1 NPU for this /32 pool. You can have an NPU working as a member of AMS (MAMS), and use MS subinterfaces on same NPU to drive another/different NAT service-set.

HTH

Thanks
Alex

Hello,

---

@radeon-1 wrote:

Hello!

Where i can read about this case? book or example?

 

 

---

Try this free book  https://www.juniper.net/uk/en/training/jnbooks/day-one/networking-technologies-series/deploying-cgnat/ 

---

@radeon-1 wrote:

 

ps: Allocate a single address pool (/32) <> service interface "expensive"

---

You don't have to dedicate 1 NPU for this /32 pool. You can have an NPU working as a member of AMS (MAMS), and use MS subinterfaces on same NPU to drive another/different NAT service-set.

HTH

Thanks
Alex

Hello! 

Is good news!! i will try this feature. 

THX!