A16B-2200-0450
ABB集團(tuán)位列全球500強(qiáng)企業(yè)，集團(tuán)總部位于瑞士蘇黎世。ABB由兩個歷史 100多年的國際性企業(yè)瑞典的阿西亞公司（ASEA）和瑞士的布朗勃法瑞 公司（BBC Brown Boveri）在1988年合并而成。兩公司分別成立于188 3年和1891年。ABB是電力和自動化技術(shù)領(lǐng)域的領(lǐng)導(dǎo)廠商。ABB的技術(shù)可 以幫助電力、公共事業(yè)和工業(yè)客戶提高業(yè)績，同時降低對環(huán)境的不良影 響。ABB集團(tuán)業(yè)務(wù)遍布全球100多個國家，擁有13萬名員工，2010年銷售 額高達(dá)320億美元。
A16B-2200-0450
聯(lián)系人：郭先生
聯(lián)系電話：18971415643《優(yōu)先》
座機(jī)：027-83238871
傳真：207-61537051
QQ：810334512《優(yōu)先》
A16B-2200-0450
生成樹的重計算： 當(dāng)網(wǎng)絡(luò)的拓?fù)浣Y(jié)構(gòu)發(fā)生改變時，生成樹協(xié)議重新計算，以生成新的生成 樹結(jié)構(gòu)。當(dāng)所有交換機(jī)的端口狀態(tài)變?yōu)檗D(zhuǎn)發(fā)或阻塞時，意味著重新計算 完畢。這種狀態(tài)稱為會聚（Convergence）。 注意：在網(wǎng)絡(luò)拓?fù)浣Y(jié)構(gòu)改變期間，設(shè)備直到生成樹會聚才能進(jìn)行通信， 這可能會對 某些應(yīng)用產(chǎn)生影響，因此一般認(rèn)為可以使生成樹運(yùn)行良好 的交換網(wǎng)絡(luò)，不應(yīng)該超過七層。此外可以通過一些特殊的交換機(jī)技術(shù)加 快會聚的時間。
3RT60161AQ02
3RT60161AR61
3RT60161AR62
3RT60161AU01
3RT60161AU02
3RT60161BB41
3RT60161BB42
3RT60161BF41
3RT60161BF42
3RT60161BG41
3RT60161BG42
3RT60161BM41
3RT60161BM42
3RT60161BW41
3RT60161BW42
3RT60161KB41
3RT60161KB42
3RT60161KF41
3RT60161KF42
3RT60171AB01
3RT60171AB02
3RT60171AF01
3RT60171AF02
3RT60171AG01
3RT60171AG02
3RT60171AH01
3RT60171AH02
3RT60171AN21
3RT60171AN22
3RT60171AP01
3RT60171AP02
3RT60171AQ01
3RT60171AQ02
3RT60171AR61
3RT60171AR62
3RT60171BB41
3RT60171BB42
3RT60171BF41
3RT60171BF42
3RT60171BM41
3RT60171BM42
3RT60171BW41
3RT60171BW42
3RT60171KB41
3RT60171KB42
3RT60171KF41
3RT60171KF42
3RT60181AB01
3RT60181AB02
3RT60181AD01
3RT60181AD02
3RT60181AF01
3RT60181AF02
3RT60181AG01
3RT60181AG02
3RT60181AH01
3RT60181AH02
3RT60181AK21
3RT60181AK22
3RT60181AM21
3RT60181AM22
3RT60181AN21
3RT60181AN22
3RT60181AP01
3RT60181AP02
3RT60181AQ01
3RT60181AQ02
3RT60181AR61
3RT60181AR62
3RT60181AU01
3RT60181AU02
3RT60181BB41
3RT60181BB42
3RT60181BF41
3RT60181BF42
3RT60181BG41
3RT60181BG42
3RT60181BM41
3RT60181BM42
3RT60181BW41
3RT60181BW42
3RT60231AB00
3RT60231AC20
3RT60231AF00
3RT60231AG00
3RT60231AG20
3RT60231AH00
3RT60231AL20
3RT60231AM00
3RT60231AN20
3RT60231AP00
3RT60231AQ00
3RT60231AR60
3RT60231BB40
3RT60231BF40
3RT60231BM40
3RT60231BW40
3RT60241AB00
3RT60241AC20
3RT60241AF00
3RT60241AG00
3RT60241AG20
3RT60241AH00
3RT60241AL20
3RT60241AM00
3RT60241AN20
3RT60241AP00
3RT60241AQ00
3RT60241AR60
3RT60241BB40
3RT60241BF40
3RT60241BM40
3RT60241BW40
3RT60251AB00
3RT60251AC20
3RT60251AF00
3RT60251AG00
3RT60251AG20
3RT60251AH00
3RT60251AL20
3RT60251AM00
3RT60251AN20
3RT60251AP00
3RT60251AQ00
3RT60251AR60
3RT60251BB40
3RT60251BF40
3RT60251BM40
3RT60251BW40
3RT60251KB40
3RT60251KF40
3RT60261AB00
3RT60261AC20
3RT60261AF00
3RT60261AG00
3RT60261AG20
3RT60261AH00
3RT60261AK60
3RT60261AL20
3RT60261AM00
3RT60261AN20
3RT60261AP00
3RT60261AQ00
3RT60261AR60
3RT60261BB40
3RT60261BF40
3RT60261BM40
3RT60261BW40
3RT60261KB40
3RT60261KF40
3RT60271AB00
3RT60271AC20
3RT60271AD20
3RT60271AF00
3RT60271AG00
3RT60271AG20
3RT60271AH00
3RT60271AL20
3RT60271AM00
3RT60271AM20
3RT60271AN20
3RT60271AP00
3RT60271AQ00
3RT60271AR60
3RT60271AU00
3RT60271BB40
3RT60271BF40
3RT60271BM40
3RT60271BW40
3RT60271KB40
3RT60271KF40
3RT60281AB00
3RT60281AC20
3RT60281AF00
3RT60281AG00
3RT60281AG20
3RT60281AH00
3RT60281AK60
3RT60281AL20
3RT60281AM00
3RT60281AN20
3RT60281AP00
3RT60281AQ00
3RT60281AR60
3RT60281BB40
3RT60281BF40
3RT60281BM40
3RT60281BW40
3RT69161BB00
3RT69161BC00
3RT69161BD00
3RT69161BE00
3RT69161BF00
3RT69161CB00
3RT69161CC00
3RT69161CD00
3RT69161CE00
3RT69161CF00
3RT69161DG00
3RT69161EH00
3RT69261BB00
3RT69261BC00
3RT69261BD00
3RT69261BE00
3RT69261BF00
3RT69261CB00
3RT69261CC00
3RT69261CD00
3RT69261CE00
3RT69261CF00
3RT69261ER00
3RT69261ES00