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)" <[email protected]> wrote: > Harvey, > > Can you please tell me what's on the other side? > > Tnx > Arie > > -----Original Message----- > From: cisco-nsp [mailto:[email protected]] On Behalf Of > Harvey Young > Sent: Tuesday, July 30, 2013 18:18 PM > To: [email protected] > 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. > > <[email protected]>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 [email protected] > https://puck.nether.net/mailman/listinfo/cisco-nsp > archive at http://puck.nether.net/pipermail/cisco-nsp/ _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
