Re: Maximum Metric for OSPF E1 Routes

Interestingly enough, I got an e1 route to go far beyond the max metric and I
also got intra area routes to go beyond the 65535 metric. I thought these
would have 'poisoned' the route but I guess not. So in essence, unless this
is a code version thing, there is no way to poison an OSPF route using a large
metric. Has anyone had a different experience?
 
R5#show ip route
Codes: C -
connected, S - static, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX -
EIGRP external, O - OSPF, IA - OSPF inter area
       N1 - OSPF NSSA external
type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 -
OSPF external type 2
       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1,
L2 - IS-IS level-2
       ia - IS-IS inter area, * - candidate default, U -
per-user static route
       o - ODR, P - periodic downloaded static route
Gateway of last resort is not set
     1.0.0.0/32 is subnetted, 1 subnets
O
E1 1.1.1.1 [110/17039354] via 10.4.5.4, 00:00:00, FastEthernet0/1
    
2.0.0.0/32 is subnetted, 1 subnets
O 2.2.2.2 [110/196606] via 10.4.5.4,
00:00:00, FastEthernet0/1
     4.0.0.0/32 is subnetted, 1 subnets
O
4.4.4.4 [110/65536] via 10.4.5.4, 00:00:00, FastEthernet0/1
     5.0.0.0/32 is
subnetted, 1 subnets
C 5.5.5.5 is directly connected, Loopback0
    
10.0.0.0/24 is subnetted, 4 subnets
O 10.1.2.0 [110/262140] via
10.4.5.4, 00:00:00, FastEthernet0/1
C 10.4.5.0 is directly connected,
FastEthernet0/1
O 10.2.3.0 [110/196605] via 10.4.5.4, 00:00:00,
FastEthernet0/1
O 10.3.4.0 [110/131070] via 10.4.5.4, 00:00:00,
FastEthernet0/1
R5#

Make a small loan, Make a big difference - Kiva.org
________________________________
 From: Marko Milivojevic
<markom_at_ipexpert.com>
To: Dave Serra <maybeedave_at_yahoo.com>
Cc: Cisco
certification <ccielab_at_groupstudy.com>
Sent: Monday, April 30, 2012 12:20 PM
Subject: Re: Maximum Metric for OSPF E1 Routes
  
Dave,

Router LSAs can have
a much larger *calculated* metric than that.
That's the maximum interface cost
that can be carried in the LSA. I'd
have to check the format, but on top of my
head, I think the external
metric is a 24bit value.

--
Marko Milivojevic -
CCIE #18427 (SP R&S)
Senior CCIE Instructor - IPexpert
On Mon, Apr 30, 2012
at 05:05, Dave Serra <maybeedave_at_yahoo.com> wrote:
> Hi Guys,
>
> I know the
maximum metric a router LSA can have is 65534 but is
> that the same for E1
routes? B We are using some pretty large metrics in our
> network and I don't
want routes to go dead on me.
>
> Thanks!
>
> Make a small
> loan, Make a big
difference - Kiva.org
>
>
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