[c-nsp] ASR 9922 IOS-XR 4.3.1

[Jared Mauch]

Is it possible you are seeing this or a variant?

http://tools.cisco.com/Support/BugToolKit/search/getBugDetails.do?method=fetchBugDetails&bugId=CSCug76950

On Jul 31, 2013, at 12:27 AM, Harvey <harveyyoung at gmail.com> wrote:

> Hello,
> 
> The other side is a brocade. I confirmed via sniffing the transmitted rsvp packets from the ASR are set with mtu 500. Any idea where it's getting this from and how it can be changed ? 
> 
> Cheers,
> 
> Harvey Young
> 
> On Jul 30, 2013, at 8:45 PM, "Arie Vayner (avayner)" <avayner at cisco.com> wrote:
> 
>> Harvey,
>> 
>> Can you please tell me what's on the other side?
>> 
>> Tnx
>> Arie
>> 
>> -----Original Message-----
>> From: cisco-nsp [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Harvey Young
>> Sent: Tuesday, July 30, 2013 18:18 PM
>> To: cisco-nsp at puck.nether.net
>> Subject: [c-nsp] ASR 9922 IOS-XR 4.3.1
>> 
>> Hello Experts,
>> 
>> Question:
>> 
>> How is the T Spec MTU set on the ASR? I am running into a wall, the ASR sends T Spec mtu of 500 for an RSVP LSP. However, 500 is not set anywhere.
>> I have the following MTU set: (Including snip bits from configuration, see
>> below)
>> 
>> Essentially the setup is an RSVP-TE LSP and a L2PW utilizing the LSP. The remote end is sending 9198, however since the ASR is sending 500, 500 the lower mtu is negotiated and used.
>> 
>> <cisco-nsp at puck.nether.net>HundredGigE0/1/0/0 is Up, ipv4 protocol is Up
>> Vrf is default (vrfid 0x60000000)
>> Internet address is 13.1.1.1/24
>> MTU is 9212 (9198 is available to IP)
>> 
>> 
>> RP/0/RP0/CPU0:ios#show running-config interface Tue Jul 30 18:02:22.481 UTC interface Loopback1
>> ipv4 address 1.1.1.1 255.255.255.255
>> !
>> interface tunnel-te1
>> ipv4 unnumbered Loopback1
>> mpls
>> mtu 9198
>> !
>> destination 7.7.7.7
>> path-option 1 dynamic
>> !
>> interface HundredGigE0/1/0/0
>> mtu 9212
>> ipv4 address 13.1.1.1 255.255.255.0
>> mpls
>> mtu 9198
>> !
>> interface HundredGigE0/1/0/1.1 l2transport  encapsulation dot1q 1 second-dot1q 1  mtu 1528 !
>> RP/0/RP0/CPU0:ios#show running-config l2vpn Tue Jul 30 18:04:05.107 UTC l2vpn  router-id 1.1.1.1  pw-class 1
>> encapsulation mpls
>>  protocol ldp
>>  preferred-path interface tunnel-te 1
>> !
>> !
>> xconnect group 1
>> p2p 1
>>  interface HundredGigE0/1/0/1.1
>>  neighbor ipv4 7.7.7.7 pw-id 1
>>   pw-class 1
>>  !
>> mpls traffic-eng
>> interface tunnel-te1
>> !
>> interface HundredGigE0/1/0/0
>> !
>> attribute-set path-option 1
>> !
>> !
>> mpls ldp
>> neighbor 7.7.7.7 targeted
>> !
>> 
>> rsvp
>> interface Loopback1
>> !
>> interface tunnel-te1
>> bandwidth percentage 100
>> !
>> interface HundredGigE0/1/0/0
>> !
>> !
>> 
>> Trace from remote system:
>> 
>> 
>> Recv PATH From:1.1.1.1, To:7.7.7.7
>>         TTL:255, Checksum:0x25f1, Flags:0x1
>> Session    - EndPt:7.7.7.7, TunnId:1, ExtTunnId:1.1.1.1
>> SessAttr   - Name:ios_t1
>>            SetupPri:7, HoldPri:7, Flags:0x4
>> RSVPHop    - Ctype:1, Addr:13.1.1.1, LIH:100663488
>> TimeValue  - RefreshPeriod:45
>> SendTempl  - Sender:1.1.1.1, LspId:12
>> SendTSpec  - Ctype:QOS, CDR:0.000 bps, PBS:8.000 Kbps, PDR:0.000 bps
>>            MPU:40, *MTU:500* <------
>> LabelReq   - IfType:General, L3ProtID:2048
>> ERO        - IPv4Prefix 13.1.1.2/32, Strict
>>            IPv4Prefix 7.7.7.7/32, Strict
>> AdSpec     - General BreakBit:0, NumISHops:1, PathBwEstimate:0
>>                    MinPathLatency:0, CompPathMTU:9198
>>            Controlled BreakBit:0
>> _______________________________________________
>> cisco-nsp mailing list  cisco-nsp at puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp
>> archive at http://puck.nether.net/pipermail/cisco-nsp/
> 
> _______________________________________________
> cisco-nsp mailing list  cisco-nsp at puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-nsp
> archive at http://puck.nether.net/pipermail/cisco-nsp/