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Ron Maupin
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R2> show lacp interfaces ae16 Aggregated interface: ae16 LACP state: Role Exp Def Dist Col Syn Aggr Timeout Activity xe-8/3/2 Actor No No Yes Yes Yes Yes Fast Active xe-8/3/2 Partner No No Yes Yes Yes Yes Fast Active xe-8/0/0 Actor No No Yes Yes Yes Yes Fast Active xe-8/0/0 Partner No No Yes Yes Yes Yes Fast Active LACP protocol: Receive State Transmit State Mux State xe-8/3/2 Current Fast periodic Collecting distributing xe-8/0/0 Current Fast periodic Collecting distributing

R2> show configuration interfaces ae16 apply-groups [ xge-if-parameters ubfd-ae ]; description Connected to R1; aggregated-ether-options { bfd-liveness-detection { neighbor 192.168.0.38; local-address 192.168.0.13; } lacp { active; periodic fast; } } unit 3 { apply-groups core-ifl-parameters; vlan-id 3; family inet { address 10.10.20.2/30; } family mpls; }

R2> show configuration protocols isis interface ae16.3 apply-groups isis-ifl-parameters-wo-bfd; ldp-synchronization;

R2> show configuration protocols isis
inactive: traceoptions { file isis-log; flag state; } reference-bandwidth 1000g; lsp-lifetime 65535; level 1 disable; level 2 { authentication-key ""; ## SECRET-DATA authentication-type md5; wide-metrics-only; }

interface ae27.3 { apply-groups isis-ifl-parameters-wo-bfd; ldp-synchronization; } interface ae29.3 { apply-groups isis-ifl-parameters; ldp-synchronization; } interface lo0.0;

R2> show isis interface ae16.3 IS-IS interface database: Interface L CirID Level 1 DR Level 2 DR L1/L2 Metric ae16.3 2 0x1 Disabled Point to Point 50/50

R2> show lacp interfaces ae16 
Aggregated interface: ae16
    LACP state:       Role   Exp   Def  Dist  Col  Syn  Aggr  Timeout  Activity
      xe-8/3/2       Actor    No    No   Yes  Yes  Yes   Yes     Fast    Active
      xe-8/3/2     Partner    No    No   Yes  Yes  Yes   Yes     Fast    Active
      xe-8/0/0       Actor    No    No   Yes  Yes  Yes   Yes     Fast    Active
      xe-8/0/0     Partner    No    No   Yes  Yes  Yes   Yes     Fast    Active
    LACP protocol:        Receive State  Transmit State          Mux State 
      xe-8/3/2                  Current   Fast periodic Collecting distributing
      xe-8/0/0                  Current   Fast periodic Collecting distributing


R2> show configuration interfaces ae16 
apply-groups [ xge-if-parameters ubfd-ae ];
description Connected to R1;
aggregated-ether-options {
    bfd-liveness-detection {
        neighbor 192.168.0.38;
        local-address 192.168.0.13;
    }
    lacp {
        active;
        periodic fast;
    }
}
unit 3 {
    apply-groups core-ifl-parameters;
    vlan-id 3;
    family inet {
        address 10.10.20.2/30;
    }
    family mpls;
}


R2> show configuration protocols isis interface ae16.3 
apply-groups isis-ifl-parameters-wo-bfd;
ldp-synchronization;


R2> show configuration protocols isis                     
inactive: traceoptions {
    file isis-log;
    flag state;
}
reference-bandwidth 1000g;
lsp-lifetime 65535;
level 1 disable;
level 2 {
    authentication-key ""; ## SECRET-DATA
    authentication-type md5;
    wide-metrics-only;
}


interface ae27.3 {
    apply-groups isis-ifl-parameters-wo-bfd;
    ldp-synchronization;
}
interface ae29.3 {
    apply-groups isis-ifl-parameters;
    ldp-synchronization;
}
interface lo0.0;

R2> show isis interface ae16.3 
IS-IS interface database:
Interface             L CirID Level 1 DR        Level 2 DR        L1/L2 Metric
ae16.3                2   0x1 Disabled          Point to Point         50/50

R1> show lacp interfaces ae16 Aggregated interface: ae16 LACP state: Role Exp Def Dist Col Syn Aggr Timeout Activity xe-0/2/9 Actor No No Yes Yes Yes Yes Fast Active xe-0/2/9 Partner No No Yes Yes Yes Yes Fast Active xe-8/0/6 Actor No No Yes Yes Yes Yes Fast Active xe-8/0/6 Partner No No Yes Yes Yes Yes Fast Active LACP protocol: Receive State Transmit State Mux State xe-0/2/9 Current Fast periodic Collecting distributing xe-8/0/6 Current Fast periodic Collecting distributing

R1> show configuration interfaces ae16 apply-groups [ xge-if-parameters ubfd-ae ]; description Connected to R2; aggregated-ether-options { bfd-liveness-detection { neighbor 192.168.0.13; local-address 192.168.0.38; } link-speed 10g; lacp { active; periodic fast; } } unit 3 { apply-groups core-ifl-parameters; vlan-id 3; family inet { address 10.10.20.1/30; } family iso; }

R1> show configuration interfaces ae16.3 apply-groups core-ifl-parameters; vlan-id 3; family inet { address 10.10.20.1/30; } family iso;

R1> show configuration protocols isis reference-bandwidth 1000g; lsp-lifetime 65535; spf-options { delay 50; holddown 5000; rapid-runs 3; } level 1 disable; level 2 { authentication-key ""; ## SECRET-DATA authentication-type md5; wide-metrics-only; }

interface ae16.3 { apply-groups isis-ifl-parameters-wo-bfd; ldp-synchronization; }

} interface ae45.3 { apply-groups isis-ifl-parameters; ldp-synchronization; level 2 metric 33; } interface ae46.3 { apply-groups isis-ifl-parameters; ldp-synchronization; level 2 metric 33; } interface lo0.0 { passive; }

R1> show isis interface ae16.3 IS-IS interface database: Interface L CirID Level 1 DR Level 2 DR L1/L2 Metric ae16.3 2 0x1 Disabled Point to Point 33/33

R1> show route 192.168.0.13

inet.0: 38694 destinations, 113966 routes (38470 active, 1 holddown, 226 hidden)

  • = Active Route, - = Last Active, * = Both

192.168.0.13/32 *[IS-IS/18] 1d 06:58:47, metric 33 > to 10.10.20.2 via ae16.3

R1> show lacp interfaces ae16 
Aggregated interface: ae16
    LACP state:       Role   Exp   Def  Dist  Col  Syn  Aggr  Timeout  Activity
      xe-0/2/9       Actor    No    No   Yes  Yes  Yes   Yes     Fast    Active
      xe-0/2/9     Partner    No    No   Yes  Yes  Yes   Yes     Fast    Active
      xe-8/0/6       Actor    No    No   Yes  Yes  Yes   Yes     Fast    Active
      xe-8/0/6     Partner    No    No   Yes  Yes  Yes   Yes     Fast    Active
    LACP protocol:        Receive State  Transmit State          Mux State 
      xe-0/2/9                  Current   Fast periodic Collecting distributing
      xe-8/0/6                  Current   Fast periodic Collecting distributing


R1> show configuration interfaces ae16 
apply-groups [ xge-if-parameters ubfd-ae ];
description Connected to R2;
aggregated-ether-options {
    bfd-liveness-detection {
        neighbor 192.168.0.13;
        local-address 192.168.0.38;
    }
    link-speed 10g;
    lacp {
        active;
        periodic fast;
    }
}
unit 3 {
    apply-groups core-ifl-parameters;
    vlan-id 3;
    family inet {
        address 10.10.20.1/30;
    }
    family iso;
}


R1> show configuration interfaces ae16.3 
apply-groups core-ifl-parameters;
vlan-id 3;
family inet {
    address 10.10.20.1/30;
}
family iso;


R1> show configuration protocols isis 
reference-bandwidth 1000g;
lsp-lifetime 65535;
spf-options {
    delay 50;
    holddown 5000;
    rapid-runs 3;
}
level 1 disable;
level 2 {
    authentication-key ""; ## SECRET-DATA
    authentication-type md5;
    wide-metrics-only;
}

interface ae16.3 {
    apply-groups isis-ifl-parameters-wo-bfd;
    ldp-synchronization;
}

}
interface ae45.3 {
    apply-groups isis-ifl-parameters;
    ldp-synchronization;
    level 2 metric 33;
}
interface ae46.3 {
    apply-groups isis-ifl-parameters;
    ldp-synchronization;
    level 2 metric 33;
}
interface lo0.0 {
    passive;
}


R1> show isis interface ae16.3 
IS-IS interface database:
Interface             L CirID Level 1 DR        Level 2 DR        L1/L2 Metric
ae16.3                2   0x1 Disabled          Point to Point         33/33

R1> show route 192.168.0.13 

inet.0: 38694 destinations, 113966 routes (38470 active, 1 holddown, 226 hidden)
+ = Active Route, - = Last Active, * = Both

192.168.0.13/32    *[IS-IS/18] 1d 06:58:47, metric 33
                    > to 10.10.20.2 via ae16.3

R2> show lacp interfaces ae16 Aggregated interface: ae16 LACP state: Role Exp Def Dist Col Syn Aggr Timeout Activity xe-8/3/2 Actor No No Yes Yes Yes Yes Fast Active xe-8/3/2 Partner No No Yes Yes Yes Yes Fast Active xe-8/0/0 Actor No No Yes Yes Yes Yes Fast Active xe-8/0/0 Partner No No Yes Yes Yes Yes Fast Active LACP protocol: Receive State Transmit State Mux State xe-8/3/2 Current Fast periodic Collecting distributing xe-8/0/0 Current Fast periodic Collecting distributing

R2> show configuration interfaces ae16 apply-groups [ xge-if-parameters ubfd-ae ]; description Connected to R1; aggregated-ether-options { bfd-liveness-detection { neighbor 192.168.0.38; local-address 192.168.0.13; } lacp { active; periodic fast; } } unit 3 { apply-groups core-ifl-parameters; vlan-id 3; family inet { address 10.10.20.2/30; } family mpls; }

R2> show configuration protocols isis interface ae16.3 apply-groups isis-ifl-parameters-wo-bfd; ldp-synchronization;

R2> show configuration protocols isis
inactive: traceoptions { file isis-log; flag state; } reference-bandwidth 1000g; lsp-lifetime 65535; level 1 disable; level 2 { authentication-key ""; ## SECRET-DATA authentication-type md5; wide-metrics-only; }

interface ae27.3 { apply-groups isis-ifl-parameters-wo-bfd; ldp-synchronization; } interface ae29.3 { apply-groups isis-ifl-parameters; ldp-synchronization; } interface lo0.0;

R2> show isis interface ae16.3 IS-IS interface database: Interface L CirID Level 1 DR Level 2 DR L1/L2 Metric ae16.3 2 0x1 Disabled Point to Point 50/50

R1> show lacp interfaces ae16 Aggregated interface: ae16 LACP state: Role Exp Def Dist Col Syn Aggr Timeout Activity xe-0/2/9 Actor No No Yes Yes Yes Yes Fast Active xe-0/2/9 Partner No No Yes Yes Yes Yes Fast Active xe-8/0/6 Actor No No Yes Yes Yes Yes Fast Active xe-8/0/6 Partner No No Yes Yes Yes Yes Fast Active LACP protocol: Receive State Transmit State Mux State xe-0/2/9 Current Fast periodic Collecting distributing xe-8/0/6 Current Fast periodic Collecting distributing

R1> show configuration interfaces ae16 apply-groups [ xge-if-parameters ubfd-ae ]; description Connected to R2; aggregated-ether-options { bfd-liveness-detection { neighbor 192.168.0.13; local-address 192.168.0.38; } link-speed 10g; lacp { active; periodic fast; } } unit 3 { apply-groups core-ifl-parameters; vlan-id 3; family inet { address 10.10.20.1/30; } family iso; }

R1> show configuration interfaces ae16.3 apply-groups core-ifl-parameters; vlan-id 3; family inet { address 10.10.20.1/30; } family iso;

R1> show configuration protocols isis reference-bandwidth 1000g; lsp-lifetime 65535; spf-options { delay 50; holddown 5000; rapid-runs 3; } level 1 disable; level 2 { authentication-key ""; ## SECRET-DATA authentication-type md5; wide-metrics-only; }

interface ae16.3 { apply-groups isis-ifl-parameters-wo-bfd; ldp-synchronization; }

} interface ae45.3 { apply-groups isis-ifl-parameters; ldp-synchronization; level 2 metric 33; } interface ae46.3 { apply-groups isis-ifl-parameters; ldp-synchronization; level 2 metric 33; } interface lo0.0 { passive; }

R1> show isis interface ae16.3 IS-IS interface database: Interface L CirID Level 1 DR Level 2 DR L1/L2 Metric ae16.3 2 0x1 Disabled Point to Point 33/33

R1> show route 192.168.0.13

inet.0: 38694 destinations, 113966 routes (38470 active, 1 holddown, 226 hidden)

  • = Active Route, - = Last Active, * = Both

192.168.0.13/32 *[IS-IS/18] 1d 06:58:47, metric 33 > to 10.10.20.2 via ae16.3

R2> show lacp interfaces ae16 
Aggregated interface: ae16
    LACP state:       Role   Exp   Def  Dist  Col  Syn  Aggr  Timeout  Activity
      xe-8/3/2       Actor    No    No   Yes  Yes  Yes   Yes     Fast    Active
      xe-8/3/2     Partner    No    No   Yes  Yes  Yes   Yes     Fast    Active
      xe-8/0/0       Actor    No    No   Yes  Yes  Yes   Yes     Fast    Active
      xe-8/0/0     Partner    No    No   Yes  Yes  Yes   Yes     Fast    Active
    LACP protocol:        Receive State  Transmit State          Mux State 
      xe-8/3/2                  Current   Fast periodic Collecting distributing
      xe-8/0/0                  Current   Fast periodic Collecting distributing


R2> show configuration interfaces ae16 
apply-groups [ xge-if-parameters ubfd-ae ];
description Connected to R1;
aggregated-ether-options {
    bfd-liveness-detection {
        neighbor 192.168.0.38;
        local-address 192.168.0.13;
    }
    lacp {
        active;
        periodic fast;
    }
}
unit 3 {
    apply-groups core-ifl-parameters;
    vlan-id 3;
    family inet {
        address 10.10.20.2/30;
    }
    family mpls;
}


R2> show configuration protocols isis interface ae16.3 
apply-groups isis-ifl-parameters-wo-bfd;
ldp-synchronization;


R2> show configuration protocols isis                     
inactive: traceoptions {
    file isis-log;
    flag state;
}
reference-bandwidth 1000g;
lsp-lifetime 65535;
level 1 disable;
level 2 {
    authentication-key ""; ## SECRET-DATA
    authentication-type md5;
    wide-metrics-only;
}


interface ae27.3 {
    apply-groups isis-ifl-parameters-wo-bfd;
    ldp-synchronization;
}
interface ae29.3 {
    apply-groups isis-ifl-parameters;
    ldp-synchronization;
}
interface lo0.0;

R2> show isis interface ae16.3 
IS-IS interface database:
Interface             L CirID Level 1 DR        Level 2 DR        L1/L2 Metric
ae16.3                2   0x1 Disabled          Point to Point         50/50
R1> show lacp interfaces ae16 
Aggregated interface: ae16
    LACP state:       Role   Exp   Def  Dist  Col  Syn  Aggr  Timeout  Activity
      xe-0/2/9       Actor    No    No   Yes  Yes  Yes   Yes     Fast    Active
      xe-0/2/9     Partner    No    No   Yes  Yes  Yes   Yes     Fast    Active
      xe-8/0/6       Actor    No    No   Yes  Yes  Yes   Yes     Fast    Active
      xe-8/0/6     Partner    No    No   Yes  Yes  Yes   Yes     Fast    Active
    LACP protocol:        Receive State  Transmit State          Mux State 
      xe-0/2/9                  Current   Fast periodic Collecting distributing
      xe-8/0/6                  Current   Fast periodic Collecting distributing


R1> show configuration interfaces ae16 
apply-groups [ xge-if-parameters ubfd-ae ];
description Connected to R2;
aggregated-ether-options {
    bfd-liveness-detection {
        neighbor 192.168.0.13;
        local-address 192.168.0.38;
    }
    link-speed 10g;
    lacp {
        active;
        periodic fast;
    }
}
unit 3 {
    apply-groups core-ifl-parameters;
    vlan-id 3;
    family inet {
        address 10.10.20.1/30;
    }
    family iso;
}


R1> show configuration interfaces ae16.3 
apply-groups core-ifl-parameters;
vlan-id 3;
family inet {
    address 10.10.20.1/30;
}
family iso;


R1> show configuration protocols isis 
reference-bandwidth 1000g;
lsp-lifetime 65535;
spf-options {
    delay 50;
    holddown 5000;
    rapid-runs 3;
}
level 1 disable;
level 2 {
    authentication-key ""; ## SECRET-DATA
    authentication-type md5;
    wide-metrics-only;
}

interface ae16.3 {
    apply-groups isis-ifl-parameters-wo-bfd;
    ldp-synchronization;
}

}
interface ae45.3 {
    apply-groups isis-ifl-parameters;
    ldp-synchronization;
    level 2 metric 33;
}
interface ae46.3 {
    apply-groups isis-ifl-parameters;
    ldp-synchronization;
    level 2 metric 33;
}
interface lo0.0 {
    passive;
}


R1> show isis interface ae16.3 
IS-IS interface database:
Interface             L CirID Level 1 DR        Level 2 DR        L1/L2 Metric
ae16.3                2   0x1 Disabled          Point to Point         33/33

R1> show route 192.168.0.13 

inet.0: 38694 destinations, 113966 routes (38470 active, 1 holddown, 226 hidden)
+ = Active Route, - = Last Active, * = Both

192.168.0.13/32    *[IS-IS/18] 1d 06:58:47, metric 33
                    > to 10.10.20.2 via ae16.3
Source Link
Nabeel
  • 1.2k
  • 10
  • 29

IS-IS Interface Metric/Cost Calculation Issue in Juniper MX

I am facing a very strange issue with regard to IS-IS Interface Metric / Cost calculation in Juniper MX. We have configured a reference bandwidth of 1000G on all routers.This by definition means an ae interface (with 2 x 10G member Links) would yield a cost of 50G (1000G/20G = 50). We can see this using command 'show isis interface' on Junos.

However in my case , we have two routers that are directly connected using Bundle Link (AE Link) that has 2 x 10G member Links. IS-IS is running between them. Now each router should have interface metric of 50. But from CLI we see that R1 has interface metric of 33 ! while R2 has interface metric of 50 (which is correct). So How R1 is saying interface metric is 33 when it has only 2 x 10G member links. (Cost should be 50 while Junos is saying a metric of 33).

Junos on R1 is 13.3R7-S3.1 while on R2 it is 15.1R6-S5. Both are MX960 series routers.

Many Thanks ... I now share CLI output to support my query :-

<------------------------------R2------------------------------------------->

R2> show lacp interfaces ae16 Aggregated interface: ae16 LACP state: Role Exp Def Dist Col Syn Aggr Timeout Activity xe-8/3/2 Actor No No Yes Yes Yes Yes Fast Active xe-8/3/2 Partner No No Yes Yes Yes Yes Fast Active xe-8/0/0 Actor No No Yes Yes Yes Yes Fast Active xe-8/0/0 Partner No No Yes Yes Yes Yes Fast Active LACP protocol: Receive State Transmit State Mux State xe-8/3/2 Current Fast periodic Collecting distributing xe-8/0/0 Current Fast periodic Collecting distributing

R2> show configuration interfaces ae16 apply-groups [ xge-if-parameters ubfd-ae ]; description Connected to R1; aggregated-ether-options { bfd-liveness-detection { neighbor 192.168.0.38; local-address 192.168.0.13; } lacp { active; periodic fast; } } unit 3 { apply-groups core-ifl-parameters; vlan-id 3; family inet { address 10.10.20.2/30; } family mpls; }

R2> show configuration protocols isis interface ae16.3 apply-groups isis-ifl-parameters-wo-bfd; ldp-synchronization;

R2> show configuration protocols isis
inactive: traceoptions { file isis-log; flag state; } reference-bandwidth 1000g; lsp-lifetime 65535; level 1 disable; level 2 { authentication-key ""; ## SECRET-DATA authentication-type md5; wide-metrics-only; }

interface ae27.3 { apply-groups isis-ifl-parameters-wo-bfd; ldp-synchronization; } interface ae29.3 { apply-groups isis-ifl-parameters; ldp-synchronization; } interface lo0.0;

R2> show isis interface ae16.3 IS-IS interface database: Interface L CirID Level 1 DR Level 2 DR L1/L2 Metric ae16.3 2 0x1 Disabled Point to Point 50/50

<------------------------------R1------------------------------------------->

R1> show lacp interfaces ae16 Aggregated interface: ae16 LACP state: Role Exp Def Dist Col Syn Aggr Timeout Activity xe-0/2/9 Actor No No Yes Yes Yes Yes Fast Active xe-0/2/9 Partner No No Yes Yes Yes Yes Fast Active xe-8/0/6 Actor No No Yes Yes Yes Yes Fast Active xe-8/0/6 Partner No No Yes Yes Yes Yes Fast Active LACP protocol: Receive State Transmit State Mux State xe-0/2/9 Current Fast periodic Collecting distributing xe-8/0/6 Current Fast periodic Collecting distributing

R1> show configuration interfaces ae16 apply-groups [ xge-if-parameters ubfd-ae ]; description Connected to R2; aggregated-ether-options { bfd-liveness-detection { neighbor 192.168.0.13; local-address 192.168.0.38; } link-speed 10g; lacp { active; periodic fast; } } unit 3 { apply-groups core-ifl-parameters; vlan-id 3; family inet { address 10.10.20.1/30; } family iso; }

R1> show configuration interfaces ae16.3 apply-groups core-ifl-parameters; vlan-id 3; family inet { address 10.10.20.1/30; } family iso;

R1> show configuration protocols isis reference-bandwidth 1000g; lsp-lifetime 65535; spf-options { delay 50; holddown 5000; rapid-runs 3; } level 1 disable; level 2 { authentication-key ""; ## SECRET-DATA authentication-type md5; wide-metrics-only; }

interface ae16.3 { apply-groups isis-ifl-parameters-wo-bfd; ldp-synchronization; }

} interface ae45.3 { apply-groups isis-ifl-parameters; ldp-synchronization; level 2 metric 33; } interface ae46.3 { apply-groups isis-ifl-parameters; ldp-synchronization; level 2 metric 33; } interface lo0.0 { passive; }

R1> show isis interface ae16.3 IS-IS interface database: Interface L CirID Level 1 DR Level 2 DR L1/L2 Metric ae16.3 2 0x1 Disabled Point to Point 33/33

R1> show route 192.168.0.13

inet.0: 38694 destinations, 113966 routes (38470 active, 1 holddown, 226 hidden)

  • = Active Route, - = Last Active, * = Both

192.168.0.13/32 *[IS-IS/18] 1d 06:58:47, metric 33 > to 10.10.20.2 via ae16.3